1/4 the number of nX8 0..3 arrays with every element equal to exactly one or two of its horizontal and vertical neighbors.
A186167
1/4 the number of nX8 0..3 arrays with every element equal to exactly one or two of its horizontal and vertical neighbors.
Terms
- a(0) =97a(1) =677283a(2) =1610684397
External references
- oeis: A186167