Number of permutations of 0..floor((5*n-2)/2) on odd squares of an 5Xn array such that each row, column, diagonal and (downwards) antidiagonal of odd squares is increasing.
A215873
Number of permutations of 0..floor((5*n-2)/2) on odd squares of an 5Xn 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) =20a(5) =189a(6) =1642a(7) =26451a(8) =307874a(9) =7027942a(10) =98057806a(11) =2850280812a(12) =44974137856
External references
- oeis: A215873