A025686 - OEIS

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A025686

Exponent of 10 (value of j) in n-th number of form 4^i*10^j.

%I #8 Aug 09 2012 13:48:25

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

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

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

%N Exponent of 10 (value of j) in n-th number of form 4^i*10^j.

%Y Differs from A025657 at a(114). A025649 is the exponent of 4.

%K nonn

%O 1,7

%A _David W. Wilson_