A119074 Numbers k such that the k-th triangular number contains only digits {0,4,6}.
3, 11, 28, 36, 363, 944, 1095, 9596, 29680, 89895, 3634403, 2979955055, 35888885356, 9430232920411, 963784629929388363, 1149318064453932131, 10991327526794969095
Offset: 1
Links
- Giovanni Resta, Tridigital Triangular Numbers
Extensions
Two more terms from Max Alekseyev, May 10 2009
a(17) from Tyler Busby, Mar 30 2023