1/81 the number of (n+1)X6 0..2 arrays with no 2X2 subblock being a reflection across the shared element pair of any horizontal or vertical neighbor.
A183816
1/81 the number of (n+1)X6 0..2 arrays with no 2X2 subblock being a reflection across the shared element pair of any horizontal or vertical neighbor.
Terms
- a(0) =4096a(1) =1321860a(2) =414246824a(3) =131467169720
External references
- oeis: A183816