A119189 Numbers k such that the k-th triangular number contains only digits {3,5,7}.

2, 10, 3386897, 10367022, 25898098514, 33868444120607410, 3835970218282143377

Offset: 1

Author

Giovanni Resta, May 10 2006

Keywords

• nonn
• base
• more

Links

• Giovanni Resta, Tridigital Triangular Numbers.

Crossrefs

Cf. A000217, A119188. See A119034 for a table of cross-references.

Extensions

a(6)-a(7) from Tyler Busby, Mar 31 2023