[go: up one dir, main page]
login
The OEIS is supported by the many generous donors to the OEIS Foundation.
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A119222
Triangular numbers composed of digits {5,6,9}.
2
6, 55, 66, 595, 666, 5565, 5995, 6555, 5656566, 95696695, 95969966995, 956996695656, 6559566959595, 59999565655666, 66555666699966, 555665666566566, 5566956999995566, 9956596655559555, 5555666996669965995, 5555555666655656666556566566566, 55659569595955595555595595599656656
(list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
Table of n, a(n) for n=1..21.
Giovanni Resta, Tridigital Triangular Numbers.
FORMULA
a(n) = A000217(A119223(n)). - Tyler Busby, Mar 26 2023
CROSSREFS
Cf. A000217, A053971, A119223. See A119033 for a table of cross-references.
Sequence in context: A047681 A075575 A073655 * A119164 A119079 A119220
Adjacent sequences: A119219 A119220 A119221 * A119223 A119224 A119225
KEYWORD
nonn,base
AUTHOR
Giovanni Resta, May 10 2006
EXTENSIONS
a(19)-a(21) from Tyler Busby, Mar 26 2023
STATUS
approved

Lookup Welcome Wiki Register Music Plot 2 Demos Index WebCam Contribute Format Style Sheet Transforms Superseeker Recents
The OEIS Community
Maintained by The OEIS Foundation Inc.
Last modified October 6 22:35 EDT 2024. Contains 376583 sequences.
License Agreements, Terms of Use, Privacy Policy