%I #5 Mar 30 2012 18:35:26
%S 1,2,4,7,10,14,19,24,30,37,45,53,62,72,82,93,105,118,131,145,160,175,
%T 191,208,226,244,263,283,303,324,346,369,392,416,441,466,492,519,547,
%U 575,604,634,664,695,727,760,793,827,862,897,933,970,1008,1046,1085,1125,1165
%N Index of 4^n within sequence of numbers of form 4^i*7^j.
%K nonn
%O 1,2
%A _David W. Wilson_