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”).

A119228
Triangular numbers composed of digits {5,8,9}.
2
55, 595, 5995, 555985, 85989999559555, 5558888585898885, 898989555999995895, 559585958899855598985, 988889885885555858595, 85889898559958558998859955, 5595888555988988898588558558585, 8589985889588895598998885898885995, 88988559899558559855895555589855985
OFFSET
1,1
COMMENTS
a(14) > 10^40. - Tyler Busby, Mar 26 2023
FORMULA
a(n) = A000217(A119229(n)). - Tyler Busby, Mar 26 2023
CROSSREFS
Cf. A000217, A058470, A119229. See A119033 for a table of cross-references.
Sequence in context: A180326 A119085 A119170 * A119226 A219928 A226543
KEYWORD
nonn,base
AUTHOR
Giovanni Resta, May 10 2006
EXTENSIONS
a(12)-a(13) from Tyler Busby, Mar 26 2023
STATUS
approved