Number of permutations of 0..floor((n*8-1)/2) on even squares of an nX8 array such that each row, column, diagonal and (downwards) antidiagonal of even squares is increasing.

A215786

Number of permutations of 0..floor((n*8-1)/2) on even squares of an nX8 array such that each row, column, diagonal and (downwards) antidiagonal of even squares is increasing.

Terms

    a(0) =1a(1) =5a(2) =110a(3) =932a(4) =26451a(5) =234217a(6) =6812794a(7) =60485308a(8) =1761748159a(9) =15643423061a(10) =455678075546

External references