A119177 Numbers k such that the k-th triangular number contains only digits {2,6,9}.

3, 11, 36, 76, 7741188, 21305723, 4471447856, 24343059348, 6673334543723, 23094123478785548

Offset

1,1

Links

Table of n, a(n) for n=1..10.

Giovanni Resta, Tridigital Triangular Numbers.

Crossrefs

Cf. A000217, A119176. See A119034 for a table of cross-references.

Sequence in context: A222286 A119143 A119092 * A213679 A297577 A119126

Adjacent sequences: A119174 A119175 A119176 * A119178 A119179 A119180

Keyword

nonn,base,more

Author

Giovanni Resta, May 10 2006

Extensions

a(10) from Tyler Busby, Mar 31 2023

Status

approved