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Keywords
From OeisWiki
Keywords go in the Keywords field of an OEIS sequence entry. Keywords describe certain characteristics of a sequence and enable targeted searching.
Contents
Regular keywords (for permanent use)
| Keyword | Description | A-number (example) | ||
|---|---|---|---|---|
| base | Sequence is dependent on base used. | A029976 | ||
| bref | Sequence is too short to do any analysis with. | A003135 | ||
| cofr | A continued fraction expansion of a number. | A001203 | ||
| cons | A decimal expansion of a number (occasionally some other base). | A000796 | ||
| core | A fundamental sequence. | A000012 | ||
| dead | An erroneous or duplicated sequence (the table contains a number of incorrect sequences that have appeared in the literature, with pointers to the correct versions). | A185444 | ||
| dumb | An unimportant sequence. | A085808 | ||
| easy | It is easy to produce terms of this sequence. | A008592 | ||
| eigen | An eigensequence: a fixed sequence for some transformation. | A000108 | ||
| fini | A confirmed (if not by definition, then by a proof) finite sequence. | A056757 | ||
| frac | Numerators or denominators of sequence of rational numbers. | A076512 | ||
| full | The full sequence is given (implies that the sequence is finite). | A003173 | ||
| hard | Next term is not known and may be hard to find. Would someone please extend this sequence? | A001220 | ||
| hear | This sequence has a graph audio deemed to be particularly interesting and/or beautiful. | A000045 | ||
| less | This is a less interesting sequence and is less likely to be the one you were looking for. | A144572 | ||
| look | This sequence has a graph visual deemed to be particularly interesting and/or beautiful. | A099302 | ||
| more | More terms are needed! Would someone please extend this sequence? | A005820 | ||
| mult | Multiplicative:
|
A184997 | ||
| nice | An exceptionally nice sequence. | A167408 | ||
| nonn | A sequence of nonnegative numbers (more precisely, all the displayed terms are nonnegative; it is not excluded that later terms in the sequence become negative). | A000290 | ||
| obsc | Obscure, better description needed. | A086267 | ||
| sign | Sequence contains negative numbers. | A100700 | ||
| tabf | An irregular (or funny-shaped) array of numbers made into a sequence by reading it row by row. | A027746 | ||
| tabl | A regular array of numbers, such as Pascal's triangle, made into a sequence by reading it row by row. | A034851 | ||
| unkn | The definition or context is not known; anyone who can find a definition, formula, or recurrence is urged to add it to the OEIS. | A058897 | ||
| walk | Counts walks or self-avoiding paths. | A052179 | ||
| word | Depends on words for the sequence in some language. | A001166 |
Administrative keywords (for temporary use)
| Keyword | Description |
|---|---|
| allocated | The A-number has been allocated for a contributor, the entry is not ready to go live yet. |
| changed | An older entry that has been modified within the last two weeks. |
| new | New (added or modified within last two weeks, roughly). |
| probation | Included on a provisional basis, but may be deleted later at the discretion of the editor. |
| recycled | A proposed entry was rejected and now the A-number is available for another new entry. |
| uned | Not edited. Sequences should be checked to see if: the sequence is worth including; the definition is sensible; the sequence is not already in the database; the English is correct; the different parts of the entry all have the correct prefixes: cross-references are in %Y lines, formulae in %F lines, etc.; any %H lines are correctly formatted (this is easy to get wrong); etc. The keyword “uned” indicates that this sequence was not edited, usually because of time pressure. Perhaps someone could edit this sequence. |
New keywords
See: New keywords.
Suggestions for new keywords
See: Suggestions for new keywords.
Keywords currently in use
See: Keywords currently in use.
Deprecated keywords
See: Deprecated keywords.
See also
- Official description of the keywords
- Clear-cut examples of keywords
- User:Charles R Greathouse IV/Keywords
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