Number of n X n 0..3 arrays with no element x(i,j) adjacent to value 3-x(i,j) horizontally, vertically or antidiagonally, and top left element zero.
A232942
Number of n X n 0..3 arrays with no element x(i,j) adjacent to value 3-x(i,j) horizontally, vertically or antidiagonally, and top left element zero.
Terms
- a(0) =1a(1) =17a(2) =1163a(3) =328989a(4) =389997789
External references
- oeis: A232942