A119235 Numbers k such that the k-th triangular number contains only digits {6,8,9}.

3, 11, 36, 371211, 421186108, 1180677745929588

Offset: 1

Author

Giovanni Resta, May 10 2006

Keywords

• nonn
• base
• more

Comments

Next term exceeds 4.4*10^18.

Links

• G. Resta, Tridigital Triangular Numbers

Crossrefs

Cf. A000217, A119234. See A119034 for a table of cross-references.

Extensions

Lower bound updated by Max Alekseyev, Apr 30 2010