A119181 Numbers k such that the k-th triangular number contains only digits {2,8,9}.

7, 1287, 4312, 14087, 75934087, 421883687, 773669476312, 1328775549089328315687

Offset

1,1

Links

Table of n, a(n) for n=1..8.

Giovanni Resta, Tridigital Triangular Numbers

Crossrefs

Cf. A000217, A119180. See A119034 for a table of cross-references.

Sequence in context: A159994 A278178 A190266 * A152518 A210396 A289482

Adjacent sequences: A119178 A119179 A119180 * A119182 A119183 A119184

Keyword

nonn,base,more

Author

Giovanni Resta, May 10 2006

Extensions

a(8) from Bert Dobbelaere, Mar 15 2026

Status

approved