1/4 the number of n X 4 0..3 arrays with no element equal both to the element above and to the element to its left.

A185562

1/4 the number of n X 4 0..3 arrays with no element equal both to the element above and to the element to its left.

Terms

    a(0) =64a(1) =13500a(2) =2842560a(3) =598507920a(4) =126017211780

External references