Number of (n+2)X(1+2) 0..3 arrays with every 3X3 subblock row and column sum equal to 0 3 5 6 or 8 and every 3X3 diagonal and antidiagonal sum not equal to 0 3 5 6 or 8.
A252327
Number of (n+2)X(1+2) 0..3 arrays with every 3X3 subblock row and column sum equal to 0 3 5 6 or 8 and every 3X3 diagonal and antidiagonal sum not equal to 0 3 5 6 or 8.
Terms
- a(0) =2018a(1) =4006a(2) =6089a(3) =10227a(4) =20782a(5) =39981a(6) =72899a(7) =153357a(8) =302168a(9) =567097a(10) =1202847a(11) =2368322a(12) =4484823a(13) =9480225a(14) =18658628a(15) =35562999a(16) =74794479a(17) =147237358a(18) =282119525a(19) =590411221a(20) =1162720678a(21) =2237698497a(22) =4661704539a(23) =9186014080a(24) =17745282263
External references
- oeis: A252327