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A025743 Index of 10^n within sequence of numbers of form 5^i*10^j. 0

%I #5 Mar 30 2012 18:35:28

%S 1,3,6,11,17,25,34,45,57,70,85,101,119,138,159,181,204,229,255,283,

%T 312,343,375,408,443,479,517,556,597,639,682,727,773,821,870,921,973,

%U 1026,1081,1137,1195,1254,1315,1377,1440,1505,1571,1639,1708,1779,1851,1924

%N Index of 10^n within sequence of numbers of form 5^i*10^j.

%K nonn

%O 1,2

%A _David W. Wilson_

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Last modified August 26 11:32 EDT 2024. Contains 375456 sequences. (Running on oeis4.)