Number of nX2 arrays of permutations of 0..n*2-1 with rows nondecreasing modulo 2 and columns nondecreasing modulo 4.
A264636
Number of nX2 arrays of permutations of 0..n*2-1 with rows nondecreasing modulo 2 and columns nondecreasing modulo 4.
Terms
- a(0) =1a(1) =3a(2) =16a(3) =128a(4) =1152a(5) =12960a(6) =269568a(7) =6635520a(8) =165888000a(9) =4561920000a(10) =209018880000
External references
- oeis: A264636