Number of (n+2)X(4+2) 0..3 arrays with every 3X3 subblock row and column sum not equal to 0 3 5 6 or 8 and every 3X3 diagonal and antidiagonal sum equal to 0 3 5 6 or 8.
A252348
Number of (n+2)X(4+2) 0..3 arrays with every 3X3 subblock row and column sum not equal to 0 3 5 6 or 8 and every 3X3 diagonal and antidiagonal sum equal to 0 3 5 6 or 8.
Terms
- a(0) =2176a(1) =5641a(2) =15208a(3) =40756a(4) =137488a(5) =425816a(6) =1312020a(7) =4674588a(8) =14943406a(9) =47066756a(10) =170470012a(11) =547418472a(12) =1733138452a(13) =6310325660a(14) =20264448300a(15) =64210355548a(16) =234552267492a(17) =752373575104
External references
- oeis: A252348