Number of (n+2)X(4+2) 0..2 arrays with every row, column, diagonal or antidiagonal in each 3X3 subblock summing to a prime.
A251815
Number of (n+2)X(4+2) 0..2 arrays with every row, column, diagonal or antidiagonal in each 3X3 subblock summing to a prime.
Terms
- a(0) =1215a(1) =1511a(2) =5401a(3) =22922a(4) =96649a(5) =409196a(6) =1741500a(7) =7424379a(8) =31630192a(9) =134638409a(10) =573239769a(11) =2441382476a(12) =10396957545a(13) =44272817726a(14) =188528190560a(15) =802834481337
External references
- oeis: A251815