Number of permutations of 0..floor((4*n-2)/2) on odd squares of an 4Xn array such that each row, column, diagonal and (downwards) antidiagonal of odd squares is increasing.
A215872
Number of permutations of 0..floor((4*n-2)/2) on odd squares of an 4Xn array such that each row, column, diagonal and (downwards) antidiagonal of odd squares is increasing.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =4a(4) =10a(5) =78a(6) =262a(7) =3001a(8) =11694a(9) =170594a(10) =727846a(11) =12517074a(12) =56797272a(13) =1100044792a(14) =5219906670a(15) =110598847073a(16) =542976951374
External references
- oeis: A215872