A119094 Numbers k such that the k-th triangular number contains only digits {0,7,8}.

12, 39, 132, 1332, 13332, 41732, 118387, 126560, 133332, 1241612, 1333332, 11905535, 13333332, 124970227, 133333332, 1333333332, 11906972812, 13333333332, 37418660507, 37626774267, 42163256012, 133333333332

Offset

1,1

Links

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

G. Resta, Tridigital Triangular Numbers

Crossrefs

Cf. A000217, A119093. See A119034 for a table of cross-references.

Sequence in context: A154266 A236267 A392238 * A226348 A359023 A139691

Adjacent sequences: A119091 A119092 A119093 * A119095 A119096 A119097

Keyword

nonn,base

Author

Giovanni Resta, May 10 2006

Status

approved