Number of 2Xn arrays of permutations of 0..n*2-1 with rows nondecreasing modulo 2 and columns nondecreasing modulo 5.
A264660
Number of 2Xn arrays of permutations of 0..n*2-1 with rows nondecreasing modulo 2 and columns nondecreasing modulo 5.
Terms
- a(0) =1a(1) =3a(2) =16a(3) =148a(4) =2400a(5) =62800a(6) =2150784a(7) =89051520a(8) =4376959488a(9) =264110948352
External references
- oeis: A264660