Number of (n+2)X(5+2) 0..3 arrays with every 3X3 subblock row and column sum prime and every diagonal and antidiagonal sum nonprime.
A251947
Number of (n+2)X(5+2) 0..3 arrays with every 3X3 subblock row and column sum prime and every diagonal and antidiagonal sum nonprime.
Terms
- a(0) =4346a(1) =3609a(2) =8756a(3) =25231a(4) =87011a(5) =285399a(6) =875435a(7) =3103838a(8) =10096792a(9) =31749014a(10) =113723049a(11) =368726042a(12) =1185416828a(13) =4275496283a(14) =13829769780a(15) =45301551569a(16) =164329016957a(17) =530458381091
External references
- oeis: A251947