Number of permutations of 0..floor((7*n-1)/2) on even squares of an 7*n array such that each row, column, diagonal and (downwards) antidiagonal of even squares is increasing.
A215793
Number of permutations of 0..floor((7*n-1)/2) on even squares of an 7*n array such that each row, column, diagonal and (downwards) antidiagonal of even squares is increasing.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =8a(4) =125a(5) =2988a(6) =146205a(7) =6812794a(8) =673507749a(9) =48337803306
External references
- oeis: A215793