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Least k such that base 5 representation of n begins at s(k), where s=A031251.
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%I #4 Mar 30 2012 18:56:21

%S 3,2,1,6,3,31,22,12,25,23,2,19,10,15,13,11,1,7,5,36,26,16,6,46,33,253,

%T 178,3,255,32,31,175,100,206,22,29,161,97,131,12,27,86,71,56,207,25,

%U 166,91,195,192,23,163,88,180,2,30,21,85,165,162

%N Least k such that base 5 representation of n begins at s(k), where s=A031251.

%K nonn

%O 1,1

%A _Clark Kimberling_