[go: up one dir, main page]

login

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

A155885
"Look and Say" applied to the whole sequence so far.
0
22, 3233, 424344, 52535455, 6263646566, 727374757677, 82838485868788, 9293949596979899
OFFSET
1,1
COMMENTS
a(1)=22 says "there are two 2's so far in the sequence (including my own digits)": this is true; a(2) says "there are three 2's and three 3's so far in the sequence (including my own digits)": this is true if we add the two 2's of a(1) to the unique 2 of a(2) and if we count the three 3's of a(2); etc. The sequence is finite (because there is no clear convention in noting more than 9 digits "d" under the traditional Look and Say rule; M. F. Hasler suggests for instance, that the next term could be [omitting the spaces]: 7 0 12 1 11 2 10 3 10 4 10 5 10 6 11 7 10 8 10 9).
CROSSREFS
Look and Say: A005150
Sequence in context: A200805 A128854 A114942 * A362901 A218719 A109776
KEYWORD
base,easy,nonn,fini
AUTHOR
Eric Angelini, Jan 29 2009
STATUS
approved