A119175 Numbers k such that the k-th triangular number contains only digits {2,6,8}.

3, 7, 11, 36, 72, 676, 1287, 2108, 11512, 21112, 23927, 35447, 37112, 41527, 67323, 35289847, 41633847, 11684368072, 24026103588, 364110500487, 7566093164465563

Offset

1,1

Comments

Next term exceeds 1.4*10^16.

Links

Table of n, a(n) for n=1..21.

G. Resta, Tridigital Triangular Numbers

Crossrefs

Cf. A000217, A119174. See A119034 for a table of cross-references.

Sequence in context: A333424 A186893 A051919 * A038913 A141178 A362005

Adjacent sequences: A119172 A119173 A119174 * A119176 A119177 A119178

Keyword

nonn,base,more

Author

Giovanni Resta, May 10 2006

Status

approved