Number of (n+2)X(n+2) 0..3 arrays with every 3X3 subblock row and column sum not 2 4 5 or 7 and every diagonal and antidiagonal sum 2 4 5 or 7.
A251868
Number of (n+2)X(n+2) 0..3 arrays with every 3X3 subblock row and column sum not 2 4 5 or 7 and every diagonal and antidiagonal sum 2 4 5 or 7.
Terms
- a(0) =1038a(1) =5632a(2) =7080a(3) =13152a(4) =107040a(5) =309144a(6) =893120a(7) =19032128a(8) =165273152a(9) =765683904a(10) =31543581824
External references
- oeis: A251868