Number of n X n 0..2 arrays with every 0 next to a 1 and every 1 next to a 2 horizontally or antidiagonally.
A232288
Number of n X n 0..2 arrays with every 0 next to a 1 and every 1 next to a 2 horizontally or antidiagonally.
Terms
- a(0) =1a(1) =15a(2) =1313a(3) =718483a(4) =2885285507
External references
- oeis: A232288