%I #8 Jul 13 2021 01:25:36
%S 10,100,1000,10000,100000,1000000,1056485,10000000,40212075,100000000,
%T 1000000000,10000000000,100000000000,100549051600,1000000000000,
%U 10000000000000,100000000000000,421438146839024,1000000000000000
%N Numbers k such that the k-th triangular number contains only digits {0,5,8}.
%H G. Resta, <a href="http://www.numbersaplenty.com/tr/tr058.html">Tridigital Triangular Numbers</a>
%Y Cf. A000217, A119083. See A119034 for a table of cross-references.
%K nonn,base
%O 1,1
%A _Giovanni Resta_, May 10 2006