A119155 Numbers k such that the k-th triangular number contains only digits {2,3,6}.

2, 3, 8, 11, 36, 211, 816, 6816, 25948, 66816, 80791, 111948, 724323, 730251, 2127563, 8511948, 364234436, 80456475963, 81513466816, 2159924381188, 2554314912583, 3651400351272436

Offset

1,1

Comments

Next term exceeds 1.4*10^16.

Links

Table of n, a(n) for n=1..22.

G. Resta, Tridigital Triangular Numbers

Crossrefs

Cf. A000217, A119154. See A119034 for a table of cross-references.

Sequence in context: A042045 A317912 A096506 * A119195 A119199 A119197

Adjacent sequences: A119152 A119153 A119154 * A119156 A119157 A119158

Keyword

nonn,base,more

Author

Giovanni Resta, May 10 2006

Status

approved