A031017 - OEIS

%I #11 Apr 10 2020 07:55:52

%S 5,4,3,2,1,8,5,73,60,46,32,18,63,61,4,57,44,30,16,49,47,45,3,41,28,14,

%T 35,33,31,29,2,25,12,21,19,17,15,13,1,9,7,78,64,50,36,22,8,92,75,803,

%U 656,509,362,5,805,74,73,653,506,359,212,696,60,71,633

%N a(n)=least k such that the base 7 representation of n begins at s(k), where s=A031016.

%K nonn,base

%O 1,1

%A _Clark Kimberling_

%E Missing a(50) and a(51) inserted by _Sean A. Irvine_, Apr 10 2020