Number of n X n 0..2 arrays with every 0 next to a 1 and every 1 next to a 2 horizontally, vertically or antidiagonally.

A232302

Number of n X n 0..2 arrays with every 0 next to a 1 and every 1 next to a 2 horizontally, vertically or antidiagonally.

Terms

    a(0) =1a(1) =37a(2) =5149a(3) =6363511a(4) =66287652717

External references