A119169 Numbers k such that the k-th triangular number contains only digits {2,5,8}.

7, 10, 32, 714, 1025, 1287, 6712, 10849, 13285, 23885, 711129, 22595807, 22619825, 40641912, 715385610, 33343322745, 332431301950, 23785828913825, 32503094884196145

Offset: 1

Author

Giovanni Resta, May 10 2006

Keywords

• nonn
• base
• more

Links

• Giovanni Resta, Tridigital Triangular Numbers.

Crossrefs

Cf. A000217, A119168. See A119034 for a table of cross-references.

Extensions

a(19) from Tyler Busby, Mar 31 2023