Number of 3Xn arrays of permutations of 0..n*3-1 with rows nondecreasing modulo 2 and columns nondecreasing modulo 4.

A264640

Number of 3Xn arrays of permutations of 0..n*3-1 with rows nondecreasing modulo 2 and columns nondecreasing modulo 4.

Terms

    a(0) =1a(1) =16a(2) =960a(3) =107568a(4) =21565440a(5) =10027929600

External references