The OEIS is supported by the many generous donors to the OEIS Foundation.
%I #5 Aug 25 2012 05:57:17
%S 1,1,1,4,25,189,2465,26451,530429,7027942,187205626,2850280812
%N Number of permutations of 0..floor((5*n-1)/2) on even squares of an 5*n array such that each row, column, diagonal and (downwards) antidiagonal of even squares is increasing
%C Row 5 of A215788
%e Some solutions for n=5
%e ..0..x..1..x..4....0..x..1..x..4....0..x..1..x..3....0..x..1..x..3
%e ..x..2..x..5..x....x..2..x..5..x....x..2..x..4..x....x..2..x..5..x
%e ..3..x..6..x..8....3..x..6..x..8....5..x..6..x..8....4..x..6..x..8
%e ..x..7..x..9..x....x..7..x.10..x....x..7..x..9..x....x..7..x..9..x
%e .10..x.11..x.12....9..x.11..x.12...10..x.11..x.12...10..x.11..x.12
%K nonn
%O 1,4
%A _R. H. Hardin_ Aug 23 2012