Number of (n+2)X(5+2) 0..2 arrays with every row, column, diagonal or antidiagonal in each 3X3 subblock summing to a prime.
A251816
Number of (n+2)X(5+2) 0..2 arrays with every row, column, diagonal or antidiagonal in each 3X3 subblock summing to a prime.
Terms
- a(0) =1973a(1) =3501a(2) =18227a(3) =96649a(4) =504148a(5) =2670355a(6) =14105237a(7) =74389411a(8) =393421321a(9) =2079994178a(10) =10983498977a(11) =58012069015a(12) =306545373362
External references
- oeis: A251816