Number of (n+2)X(4+2) 0..3 arrays with every 3X3 subblock row and column sum prime and every diagonal and antidiagonal sum nonprime.

A251946

Number of (n+2)X(4+2) 0..3 arrays with every 3X3 subblock row and column sum prime and every diagonal and antidiagonal sum nonprime.

Terms

    a(0) =2735a(1) =2053a(2) =3572a(3) =8937a(4) =25231a(5) =68456a(6) =177132a(7) =512051a(8) =1394255a(9) =3602453a(10) =10493651a(11) =28493630a(12) =73547094a(13) =215611381a(14) =583411229a(15) =1504465281a(16) =4438290073a(17) =11968260682a(18) =30834025066a(19) =91514007569a(20) =245967352689a(21) =633116564171

External references