The OEIS Foundation is grateful to everyone who made a donation during our Annual Appeal. Visit the new and spectacular Pictures from the OEIS page!
%I
%S 1,4,9,16,25,36,49,64,81,100,121,145,171,199,229,261,295,331,369,409,
%T 451,496,543,592,643,696,751,808,867,928,991,1056,1124,1194,1266,1340,
%U 1416,1494,1574,1656,1740,1826,1915,2006,2099,2194,2291,2390,2491,2594,2699
%N Index of 10^n within sequence of numbers of form 3^i*10^j.
%K nonn
%O 1,2
%A _David W. Wilson_