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

1,1

Links

Table of n, a(n) for n=1..17.

Giovanni Resta, Tridigital Triangular Numbers

Crossrefs

Cf. A000217, A119073. See A119034 for a table of cross-references.

Sequence in context: A003060 A136983 A210611 * A211810 A182260 A163696

Adjacent sequences: A119071 A119072 A119073 * A119075 A119076 A119077

Keyword

nonn,base,more

Author

Giovanni Resta, May 10 2006

Extensions

Two more terms from Max Alekseyev, May 10 2009

a(17) from Tyler Busby, Mar 30 2023

Status

approved