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%I #11 Mar 31 2023 03:20:04
%S 3,10,11,36,105,108,114,1316,3363,105516,343091,1316705,3657011,
%T 10638485,13310789,33336636,37028788,1145936870,108320504576528,
%U 3333333366663363,105725008289010683
%N Numbers k such that the k-th triangular number contains only digits {5,6,8}.
%H Giovanni Resta, <a href="http://www.numbersaplenty.com/tr/tr568.html">Tridigital Triangular Numbers</a>.
%Y Cf. A000217, A119220. See A119034 for a table of cross-references.
%K nonn,base,more
%O 1,1
%A _Giovanni Resta_, May 10 2006
%E a(21) from _Tyler Busby_, Mar 31 2023
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