Number of n X n 0..3 arrays with no element x(i,j) adjacent to value 3-x(i,j) horizontally or antidiagonally, top left element zero, and 1 appearing before 2 in row major order.
A233076
Number of n X n 0..3 arrays with no element x(i,j) adjacent to value 3-x(i,j) horizontally or antidiagonally, top left element zero, and 1 appearing before 2 in row major order.
Terms
- a(0) =1a(1) =14a(2) =1985a(3) =1588262a(4) =6938214854
External references
- oeis: A233076