A119070 Numbers k such that the k-th triangular number contains only digits {0,3,9}.

2, 24, 42, 44, 77, 260, 282, 824, 1364, 8835, 44517, 88419, 89375, 256917, 282842, 426600, 2603844, 14141435, 424287482, 894359435, 24629287602, 81351102024, 137064943244, 1371082295364, 2489711201364, 8870066515082

Offset: 1

Author

Giovanni Resta, May 10 2006

Keywords

• nonn
• base

Links

• G. Resta, Tridigital Triangular Numbers

Crossrefs

Cf. A000217, A119069. See A119034 for a table of cross-references.