Number of permutations of 0..floor((n*7-2)/2) on odd squares of an n X 7 array such that each row, column, diagonal and (downwards) antidiagonal of odd squares is increasing.

A215867

Number of permutations of 0..floor((n*7-2)/2) on odd squares of an n X 7 array such that each row, column, diagonal and (downwards) antidiagonal of odd squares is increasing.

Terms

    a(0) =1a(1) =5a(2) =29a(3) =262a(4) =1642a(5) =15485a(6) =97289a(7) =918637a(8) =5772013a(9) =54503318a(10) =342457898a(11) =3233726365a(12) =20318307913a(13) =191859642509

External references