1/3 the number of nX5 0..2 arrays with every element equal to exactly one or two of its horizontal and vertical neighbors.
A185555
1/3 the number of nX5 0..2 arrays with every element equal to exactly one or two of its horizontal and vertical neighbors.
Terms
- a(0) =5a(1) =576a(2) =25496a(3) =1317540a(4) =64354744a(5) =3228500154a(6) =160107914496
External references
- oeis: A185555