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A119155 Numbers k such that the k-th triangular number contains only digits {2,3,6}. 2

%I #8 Jul 13 2021 07:26:55

%S 2,3,8,11,36,211,816,6816,25948,66816,80791,111948,724323,730251,

%T 2127563,8511948,364234436,80456475963,81513466816,2159924381188,

%U 2554314912583,3651400351272436

%N Numbers k such that the k-th triangular number contains only digits {2,3,6}.

%C Next term exceeds 1.4*10^16.

%H G. Resta, <a href="http://www.numbersaplenty.com/tr/tr236.html">Tridigital Triangular Numbers</a>

%Y Cf. A000217, A119154. See A119034 for a table of cross-references.

%K nonn,base,more

%O 1,1

%A _Giovanni Resta_, May 10 2006

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Last modified March 28 08:22 EDT 2024. Contains 371236 sequences. (Running on oeis4.)