A119088 Numbers k such that the k-th triangular number contains only digits {0,6,7}.

3, 11, 36, 115, 363, 1095, 11576, 36624, 363504, 391576, 391588, 36333648, 123288823, 3660785999, 11014541352775, 39410677756315, 124633627940188

Offset

1,1

Comments

Next term exceeds 1.4*10^16.

Links

Table of n, a(n) for n=1..17.

G. Resta, Tridigital Triangular Numbers

Crossrefs

Cf. A000217, A119087. See A119034 for a table of cross-references.

Sequence in context: A213679 A297577 A119126 * A296391 A305132 A291413

Adjacent sequences: A119085 A119086 A119087 * A119089 A119090 A119091

Keyword

nonn,base,more

Author

Giovanni Resta, May 10 2006

Status

approved