login
Index of 9^n within sequence of numbers of form 9^i*10^j.
1

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

%S 1,2,4,7,11,16,22,29,37,46,56,67,79,92,106,121,137,154,172,191,211,

%T 232,253,275,298,322,347,373,400,428,457,487,518,550,583,617,652,688,

%U 725,763,802,842,883,925,967,1010,1054,1099,1145,1192,1240,1289,1339,1390,1442

%N Index of 9^n within sequence of numbers of form 9^i*10^j.

%K nonn

%O 1,2

%A _David W. Wilson_