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%I A031257 #6 Jul 07 2024 23:05:41
%S A031257 2,12,13,15,17,22,37,48,51,52,67,82,84,87,90,97,98,101,104,107,110,
%T A031257 112,113,116,119,122,123,125,126,127,128,131,134,142,157,159,162,165,
%U A031257 172,192,207,211,212,232,252,255,259,263,272,292
%N A031257 Position of n-th 3 in A031253.
%Y A031257 Cf. A031253.
%K A031257 nonn
%O A031257 1,1
%A A031257 _Clark Kimberling_

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