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

Author

Giovanni Resta, May 10 2006

Keywords

• nonn
• base

Links

• G. Resta, Tridigital Triangular Numbers

Crossrefs

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