Number of (n+2)X(5+2) 0..4 arrays with every row, column, diagonal or antidiagonal in each 3X3 subblock summing to a prime.
A251960
Number of (n+2)X(5+2) 0..4 arrays with every row, column, diagonal or antidiagonal in each 3X3 subblock summing to a prime.
Terms
- a(0) =417045a(1) =10509427a(2) =458358230a(3) =18033590706a(4) =731661524537
External references
- oeis: A251960