A025710 - OEIS

%I #5 Mar 30 2012 18:35:26

%S 1,2,4,7,10,14,19,25,31,38,46,55,64,74,85,96,108,121,135,149,164,180,

%T 197,214,232,251,271,291,312,334,356,379,403,428,453,479,506,534,562,

%U 591,621,652,683,715,748,781,815,850,886,922,959,997,1036,1075,1115,1156,1198

%N Index of 5^n within sequence of numbers of form 5^i*9^j.

%K nonn

%O 1,2

%A _David W. Wilson_