Number of (n+2)X(7+2) 0..4 arrays with every 3X3 subblock row and column sum prime and every diagonal and antidiagonal sum nonprime.
A251884
Number of (n+2)X(7+2) 0..4 arrays with every 3X3 subblock row and column sum prime and every diagonal and antidiagonal sum nonprime.
Terms
- a(0) =676969a(1) =2472269a(2) =8113568a(3) =64083601a(4) =513228578a(5) =3186483082a(6) =27379339268a(7) =220952120769
External references
- oeis: A251884