Number of (n+2)X(n+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 0 1 3 6 or 7 and every 3X3 column and antidiagonal sum not equal to 0 1 3 6 or 7.
A252297
Number of (n+2)X(n+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 0 1 3 6 or 7 and every 3X3 column and antidiagonal sum not equal to 0 1 3 6 or 7.
Terms
- a(0) =864a(1) =1031a(2) =1677a(3) =3032a(4) =9368a(5) =24076a(6) =48579a(7) =323902a(8) =1058568a(9) =2208135a(10) =98294702a(11) =395901344
External references
- oeis: A252297