Number of permutations of 0..floor((6*n-1)/2) on even squares of an 6*n array such that each row, column, diagonal and (downwards) antidiagonal of even squares is increasing.
A215792
Number of permutations of 0..floor((6*n-1)/2) on even squares of an 6*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) =4a(4) =50a(5) =458a(6) =15485a(7) =234217a(8) =14296434a(9) =297246092a(10) =26970790176
External references
- oeis: A215792