1/4 the number of nX7 0..3 arrays with no element equal both to the element above and to the element to its left.
A185565
1/4 the number of nX7 0..3 arrays with no element equal both to the element above and to the element to its left.
Terms
- a(0) =4096a(1) =45562500a(2) =504547256880
External references
- oeis: A185565