A119155 Numbers k such that the k-th triangular number contains only digits {2,3,6}.

2, 3, 8, 11, 36, 211, 816, 6816, 25948, 66816, 80791, 111948, 724323, 730251, 2127563, 8511948, 364234436, 80456475963, 81513466816, 2159924381188, 2554314912583, 3651400351272436

Offset: 1

Author

Giovanni Resta, May 10 2006

Keywords

• nonn
• base
• more

Comments

Next term exceeds 1.4*10^16.

Links

• G. Resta, Tridigital Triangular Numbers

Crossrefs

Cf. A000217, A119154. See A119034 for a table of cross-references.