A119114 Numbers k such that the k-th triangular number contains only digits {1,3,5}.

1, 2, 5, 10, 17, 26, 101, 257, 266, 2657, 2666, 8382, 10114, 10130, 26657, 26666, 55733, 101342, 103453, 176257, 266657, 266666, 553778, 557342, 794142, 843010, 1645085, 2666657, 2666666, 3209770, 4723421, 26666657, 26666666, 84042269

Offset: 1

Author

Giovanni Resta, May 10 2006

Keywords

• nonn
• base

Links

• G. Resta, Tridigital Triangular Numbers

Crossrefs

Cf. A000217, A119113. See A119034 for a table of cross-references.