Number of n X n 0..2 arrays with every 0 next to a 1 and every 1 next to a 2 horizontally, vertically, diagonally or antidiagonally.
A232452
Number of n X n 0..2 arrays with every 0 next to a 1 and every 1 next to a 2 horizontally, vertically, diagonally or antidiagonally.
Terms
- a(0) =1a(1) =51a(2) =8227a(3) =12521603a(4) =176788379233
External references
- oeis: A232452