Number of (n+2)X(n+2) 0..3 arrays with every 3X3 subblock row and column sum nonprime and every diagonal and antidiagonal sum prime.
A251837
Number of (n+2)X(n+2) 0..3 arrays with every 3X3 subblock row and column sum nonprime and every diagonal and antidiagonal sum prime.
Terms
- a(0) =974a(1) =508a(2) =1803a(3) =5860a(4) =79817a(5) =1226031a(6) =6811452a(7) =332307262a(8) =17060512419a(9) =115557808374
External references
- oeis: A251837