A119157 Numbers k such that the k-th triangular number contains only digits {2,3,8}.

2, 7, 87, 1287, 881287, 21158087, 25800318712, 7535029241912

Offset

1,1

Comments

Next term exceeds 4.4*10^20.

Links

Table of n, a(n) for n=1..8.

G. Resta, Tridigital Triangular Numbers

Crossrefs

Cf. A000217, A119156. See A119034 for a table of cross-references.

Sequence in context: A041291 A209331 A054919 * A079701 A327039 A096208

Adjacent sequences: A119154 A119155 A119156 * A119158 A119159 A119160

Keyword

nonn,base,more

Author

Giovanni Resta, May 10 2006

Extensions

Lower bound for the next term updated by Max Alekseyev, May 21 2009, Mar 5 2023

Status

approved