A119193 Numbers k such that the k-th triangular number contains only digits {3,5,9}.

2, 10, 34, 109, 8189, 108989, 4470645, 32727845, 1095073836189, 1091781620649419010

Offset: 1

Author

Giovanni Resta, May 10 2006

Keywords

• nonn
• base
• more

Links

• G. Resta, Tridigital Triangular Numbers

Crossrefs

Cf. A000217, A119192. See A119034 for a table of cross-references.

Extensions

a(10) from Max Alekseyev, May 21 2011