Number of (n+2)X(5+2) 0..3 arrays with every 3X3 subblock row and column sum 2 4 5 or 7 and every diagonal and antidiagonal sum not 2 4 5 or 7.
A251920
Number of (n+2)X(5+2) 0..3 arrays with every 3X3 subblock row and column sum 2 4 5 or 7 and every diagonal and antidiagonal sum not 2 4 5 or 7.
Terms
- a(0) =5810a(1) =10704a(2) =27366a(3) =80438a(4) =340800a(5) =1316762a(6) =5742474a(7) =24518672a(8) =111841952a(9) =475675160a(10) =2195264850a(11) =9409677550a(12) =43424782424a(13) =186174329366a(14) =859992120484
External references
- oeis: A251920