Number of nX4 0..2 arrays with every element equal to some element at offset (-1,-1) (-1,0) (-1,1) (0,-1) (0,1) or (1,0) both plus 1 mod 3 and minus 1 mod 3, with new values introduced in order 0..2.

A277763

Number of nX4 0..2 arrays with every element equal to some element at offset (-1,-1) (-1,0) (-1,1) (0,-1) (0,1) or (1,0) both plus 1 mod 3 and minus 1 mod 3, with new values introduced in order 0..2.

Terms

    a(0) =0a(1) =18a(2) =204a(3) =9741a(4) =270291a(5) =8971150a(6) =280603511a(7) =8946059000a(8) =283436060320

External references