%I #11 Jul 13 2021 07:26:00
%S 3,11,36,923,23076,211963,9656548,35906663076,9635790203866668,
%T 35401826004387588
%N Numbers k such that the k-th triangular number contains only digits {2,4,6}.
%C Next term exceeds 3.1*10^18.
%H G. Resta, <a href="http://www.numbersaplenty.com/tr/tr246.html">Tridigital Triangular Numbers</a>
%Y Cf. A000217, A119160. See A119034 for a table of cross-references.
%K nonn,base,more
%O 1,1
%A _Giovanni Resta_, May 10 2006
%E a(10) from _Max Alekseyev_, Jun 16 2011