Search: id:A081152
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%I A081152
%S A081152 0,1,6,37,212,1226,6822,38081,215414
%N A081152 Number of even cycles in range [A014137(2n)..A014138(2n)] of permutation 
               A057505/A057506.
%Y A081152 a(n) = A081150(2n+1) = A081159(n)+A081161(n)+A081163(n). Cf. A081151.
%Y A081152 Sequence in context: A156185 A057418 A001419 this_sequence A033116 A033124 
               A022035
%Y A081152 Adjacent sequences: A081149 A081150 A081151 this_sequence A081153 A081154 
               A081155
%K A081152 nonn
%O A081152 0,3
%A A081152 Wouter Meeussen (wouter.meeussen(AT)pandora.be) & Antti Karttunen (Firstname.Surname(AT)iki.fi) 
               Mar 10 2003

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