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Least k such that base 8 representation of n begins at s(k), where s=A031057.
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%I #4 Mar 30 2012 18:56:20

%S 1,13,2,29,3,45,4,61,5,14,1,30,9,46,11,157,13,181,15,205,17,229,19,

%T 253,8,16,23,32,2,48,27,349,29,373,31,397,33,421,35,445,10,18,26,34,

%U 41,50,3,541,45,565,47,589,49,613,51,637,4,12,20,28

%N Least k such that base 8 representation of n begins at s(k), where s=A031057.

%K nonn

%O 1,2

%A _Clark Kimberling_