1/5 the number of n X 7 0..4 arrays with every element equal to exactly one or two of its horizontal and vertical neighbors.
A185823
1/5 the number of n X 7 0..4 arrays with every element equal to exactly one or two of its horizontal and vertical neighbors.
Terms
- a(0) =65a(1) =426928a(2) =956312244
External references
- oeis: A185823