Number of (n+2)X(7+2) 0..3 arrays with every 3X3 subblock row and column sum 2 4 5 or 7 and every diagonal and antidiagonal sum not 2 4 5 or 7.
A251922
Number of (n+2)X(7+2) 0..3 arrays with every 3X3 subblock row and column sum 2 4 5 or 7 and every diagonal and antidiagonal sum not 2 4 5 or 7.
Terms
- a(0) =12872a(1) =34396a(2) =153792a(3) =856022a(4) =5742474a(5) =36065236a(6) =249690188a(7) =1610617806a(8) =11148308670a(9) =71796251804a(10) =499209800968
External references
- oeis: A251922