Half the number of (n+1)X(n+1) 0..3 arrays with every 2X2 subblock diagonal sum differing from its antidiagonal sum by more than 3.
A184222
Half the number of (n+1)X(n+1) 0..3 arrays with every 2X2 subblock diagonal sum differing from its antidiagonal sum by more than 3.
Terms
- a(0) =15a(1) =411a(2) =20958a(3) =4207437a(4) =2100723171
External references
- oeis: A184222