A119229 Numbers k such that the k-th triangular number contains only digits {5,8,9}.

10, 34, 109, 1054, 13114114, 105440870, 1340887434, 33454026929, 44472235965, 13106479203810, 3345411351684270, 131072391368959890, 421873345684598945

Offset

1,1

Links

Table of n, a(n) for n=1..13.

Giovanni Resta, Tridigital Triangular Numbers.

Crossrefs

Cf. A000217, A119228. See A119034 for a table of cross-references.

Sequence in context: A288782 A020877 A119171 * A119227 A218631 A166066

Adjacent sequences: A119226 A119227 A119228 * A119230 A119231 A119232

Keyword

nonn,base,more

Author

Giovanni Resta, May 10 2006

Extensions

a(12)-a(13) from Tyler Busby, Mar 31 2023

Status

approved