Number of nX4 0..2 arrays x(i,j) with each element horizontally, diagonally or antidiagonally next to at least one element with value (x(i,j)+1) mod 3 and at least one element with value (x(i,j)-1) mod 3, and upper left element zero.
A231033
Number of nX4 0..2 arrays x(i,j) with each element horizontally, diagonally or antidiagonally next to at least one element with value (x(i,j)+1) mod 3 and at least one element with value (x(i,j)-1) mod 3, and upper left element zero.
Terms
- a(0) =0a(1) =4a(2) =72a(3) =1344a(4) =20250a(5) =375620a(6) =6620496a(7) =114765278a(8) =2040092280a(9) =36070020410a(10) =636310267444
External references
- oeis: A231033