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A119136 Triangular numbers composed of digits {1,5,8}. 2
1, 15, 55, 5151, 8515, 581581, 885115, 1188111, 11188815, 51151555, 81581151, 88851115, 851585815, 8888511115, 888885111115, 88888851111115, 8888888511111115, 888888885111111115, 5885188811851888815, 15158585181118581555, 88888888851111111115 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
LINKS
FORMULA
a(n) = A000217(A119137(n)). - Michel Marcus, Mar 24 2023
CROSSREFS
Cf. A000217, A053905, A119137. See A119033 for a table of cross-references.
Sequence in context: A219592 A104724 A106659 * A036522 A227219 A250956
KEYWORD
nonn,base
AUTHOR
Giovanni Resta, May 10 2006
EXTENSIONS
a(20)-a(21) from Tyler Busby, Mar 23 2023
STATUS
approved

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Last modified May 23 09:12 EDT 2024. Contains 372760 sequences. (Running on oeis4.)