Number of (n+2)X(6+2) 0..3 arrays with every 3X3 subblock row and column sum prime and every diagonal and antidiagonal sum nonprime.
A251948
Number of (n+2)X(6+2) 0..3 arrays with every 3X3 subblock row and column sum prime and every diagonal and antidiagonal sum nonprime.
Terms
- a(0) =7115a(1) =7348a(2) =21326a(3) =68456a(4) =285399a(5) =1086474a(6) =3678858a(7) =15275433a(8) =58358828a(9) =199425794a(10) =822991437a(11) =3164755490a(12) =10882904022a(13) =44661659875a(14) =172688623754a(15) =596827533076
External references
- oeis: A251948