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%I #7 Mar 12 2015 23:01:49
%S 1,5,7,0,12,18,19,20,22,25,28,34,37,42,48,41,38,53,51,50,57,63,67,66,
%T 76,68,61,80,82,79,83,0,77,104,89,73,85,94,110,109,118,108,107,0,116,
%U 105,131,114,129,137,128,115,122,124,127,0,134,135,144,159,140
%N a(n) = smallest positive m such that m! contains exactly n 0's, or 0 if no such m exists.
%e a(1)=5: 5!=120, which has only 1 zero. Other numbers with only 1 zero are 6 and 9.
%e a(2)=7 since 7th factorial, i.e., 7!=5040 contains exactly two 0's.
%e a(3)=0 since no factorial contains just three zeros.
%Y Cf. A072419.
%K base,nonn
%O 0,2
%A _Shyam Sunder Gupta_, Jul 31 2002
%E Edited by _N. J. A. Sloane_, Sep 06 2008 at the suggestion of _R. J. Mathar_
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