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

1,1

Links

Table of n, a(n) for n=1..19.

Giovanni Resta, Tridigital Triangular Numbers.

Crossrefs

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

Sequence in context: A317797 A284418 A244165 * A095756 A241251 A126076

Adjacent sequences: A119166 A119167 A119168 * A119170 A119171 A119172

Keyword

nonn,base,more

Author

Giovanni Resta, May 10 2006

Extensions

a(19) from Tyler Busby, Mar 31 2023

Status

approved