Number of (n+2)X(2+2) 0..4 arrays with every 3X3 subblock row and column sum nonprime and every diagonal and antidiagonal sum prime.
A252034
Number of (n+2)X(2+2) 0..4 arrays with every 3X3 subblock row and column sum nonprime and every diagonal and antidiagonal sum prime.
Terms
- a(0) =31774a(1) =55941a(2) =84953a(3) =183494a(4) =710758a(5) =2297641a(6) =9138994a(7) =27977649a(8) =118955569a(9) =380855595a(10) =1552701716a(11) =4826092817a(12) =20665212175a(13) =66338031686a(14) =273170530792a(15) =850783059320
External references
- oeis: A252034