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%I #2 Mar 31 2012 10:22:15
%S 20,30,0,10,0,0
%N a(n)= Number of 5 X 5 permutation matrices with trace n and determinant -1
%e a(0)=20 because we have 20 different permutation matrices 5 x 5 with trace 0 and determinant -1.
%Y A171806, A171808, A171809, A171906, A171907
%K fini,full,nonn
%O 0,1
%A _Artur Jasinski_, Dec 31 2009
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