A025650 - OEIS

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

%S 0,0,1,0,1,2,0,1,2,3,0,1,2,3,4,0,1,2,3,4,5,0,1,2,3,4,5,6,0,1,2,3,4,5,

%T 6,0,7,1,2,3,4,5,6,0,7,1,8,2,3,4,5,6,0,7,1,8,2,9,3,4,5,6,0,7,1,8,2,9,

%U 3,10,4,5,6,0,7,1,8,2,9,3,10,4,11,5,6,0,7,1,8,2,9,3,10,4,11,5,12,6,0,7,1,8,2,9

%N Exponent of 5 (value of j) in n-th number of form 4^i*5^j.

%Y Differs from A025674 at a(1881).

%K nonn

%O 1,6

%A _David W. Wilson_