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%I #10 Jul 13 2021 01:21:02
%S 44,64656155,429439844,632914215,21072266180
%N Numbers k such that the k-th triangular number contains only digits {0,2,9}.
%C Next term must be greater than 1.4*10^20. - _Max Alekseyev_, Aug 14 2013
%H G. Resta, <a href="http://www.numbersaplenty.com/tr/tr029.html">Tridigital Triangular Numbers</a>
%Y Cf. A000217, A119057. See A119034 for a table of cross-references.
%K nonn,base,more
%O 1,1
%A _Giovanni Resta_, May 10 2006