1/81 the number of (n+1) X 4 0..2 arrays with no 2 X 2 subblock being a reflection across the shared element pair of any horizontal or vertical neighbor.
A183814
1/81 the number of (n+1) X 4 0..2 arrays with no 2 X 2 subblock being a reflection across the shared element pair of any horizontal or vertical neighbor.
Terms
- a(0) =64a(1) =3256a(2) =163208a(3) =8231592a(4) =414246824a(5) =20864057480
External references
- oeis: A183814