Number of (n+2)X(n+2) 0..4 arrays with every 3X3 subblock row and column sum prime and every diagonal and antidiagonal sum nonprime.
A251877
Number of (n+2)X(n+2) 0..4 arrays with every 3X3 subblock row and column sum prime and every diagonal and antidiagonal sum nonprime.
Terms
- a(0) =5495a(1) =16857a(2) =94046a(3) =1036785a(4) =17612152a(5) =615536028a(6) =27379339268
External references
- oeis: A251877