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Numbers k such that the k-th triangular number contains only digits {0,3,8}.
2

%I #10 Jul 13 2021 01:20:17

%S 2,24,77,126797,12714624,129079888464,77885018846797,4009565647007922,

%T 40750555532000002

%N Numbers k such that the k-th triangular number contains only digits {0,3,8}.

%C Next term exceeds 1.4*10^17.

%H G. Resta, <a href="http://www.numbersaplenty.com/tr/tr038.html">Tridigital Triangular Numbers</a>

%Y Cf. A000217, A119067. See A119034 for a table of cross-references.

%K nonn,base,more

%O 1,1

%A _Giovanni Resta_, May 10 2006

%E One more term from _Max Alekseyev_, Mar 09 2009