A119056 Numbers k such that the k-th triangular number contains only digits {0,2,8}.

7, 40, 64, 400, 632, 1287, 4000, 40000, 126712, 209775, 400000, 646232, 663367, 4000000, 40000000, 75897600, 213645607, 400000000, 4000000000, 12713841912, 40000000000, 400000000000, 749506541784, 4000000000000, 20397451214712

Offset

1,1

Links

Table of n, a(n) for n=1..25.

G. Resta, Tridigital Triangular Numbers

Crossrefs

Cf. A000217, A119055. See A119034 for a table of cross-references.

Sequence in context: A165700 A249635 A164135 * A164083 A096200 A365373

Adjacent sequences: A119053 A119054 A119055 * A119057 A119058 A119059

Keyword

nonn,base

Author

Giovanni Resta, May 10 2006

Status

approved