%I A020648
%S A020648 1,6,9,15,18,24,27,30,36,39,45,48,54,54,60,63,69,72,78,81,81,87,90,96,
               99,
%T A020648 105,108,111,117,120,126,129,135,135,141,144,150,153,159,162,162,168,171,
%U A020648 177,180,186,189,192,198,201,207,210,216,216,222,225,231,234,240,243,243
%N A020648 Least positive integer k for which 9^n divides k!.
%H A020648 T. D. Noe, <a href="b020648.txt">Table of n, a(n) for n=0..1000</a>
%Y A020648 Sequence in context: A020717 A139322 A139321 this_sequence A020147 A164383 
               A001748
%Y A020648 Adjacent sequences: A020645 A020646 A020647 this_sequence A020649 A020650 
               A020651
%K A020648 nonn
%O A020648 0,2
%A A020648 David W. Wilson (davidwwilson(AT)comcast.net)