A119207 Numbers k such that the k-th triangular number contains only digits {4,5,8}.
9, 10, 9854, 411933209, 9443035090314, 29851116744790, 30195643554810, 3423114221246070
Offset: 1
Links
- G. Resta, Tridigital Triangular Numbers
This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
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