Number of permutations of 0..floor((n*9-2)/2) on odd squares of an nX9 array such that each row, column, diagonal and (downwards) antidiagonal of odd squares is increasing.

A215869

Number of permutations of 0..floor((n*9-2)/2) on odd squares of an nX9 array such that each row, column, diagonal and (downwards) antidiagonal of odd squares is increasing.

Terms

    a(0) =1a(1) =14a(2) =290a(3) =11694a(4) =307874a(5) =14296434a(6) =386699176a(7) =18255280444a(8) =494952307400

External references