Number of permutations of 0..floor((n*n-1)/2) on even squares of an n X n array such that each row and column of even squares is increasing.
A215286
Number of permutations of 0..floor((n*n-1)/2) on even squares of an n X n array such that each row and column of even squares is increasing.
Terms
- a(0) =1a(1) =2a(2) =10a(3) =280a(4) =60060a(5) =85765680
External references
- oeis: A215286