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%I #9 Mar 30 2012 18:58:21
%S 0,0,2,7,23,105,386,1674,6121,25072,89070,391317,1432287,5414201,
%T 20125565,80661495,273257927,1073041080,3588277692,13732078994,
%U 49417761548,176544997915,551992576980,2143844160219,7367037483012
%N Number of permutations p of (1,2,3,...,n) such that sum(k=1,n,p(k) reduced modulo k) =n.
%o (PARI) a(n)=sum(k=1,n!,if(sum(i=1,n,i%component(numtoperm(n,k),i))-n,0,1))
%K more,nonn
%O 1,3
%A _Benoit Cloitre_, Aug 23 2002
%E a(10) from Mohammed Bouayoun (bouyao(AT)wanadoo.fr), Mar 14 2004
%E a(11)-a(25) from _Robert Gerbicz_, Nov 22 2010
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