A119092 Numbers k such that the k-th triangular number contains only digits {0,6,9}.

3, 11, 36, 44, 363, 371, 1095, 1104, 1175, 44036, 348396, 440363, 366060011, 439560371, 3715095963, 140755746596, 3651575002644, 11042554867508396, 36350791163221211520

Offset: 1

Author

Giovanni Resta, May 10 2006

Keywords

• nonn
• base
• more

Links

• Giovanni Resta, Tridigital Triangular Numbers.

Crossrefs

Cf. A000217, A119091. See A119034 for a table of cross-references.

Extensions

a(19) from Tyler Busby, Mar 30 2023