Number of (n+2) X (2+2) 0..3 arrays with every 3 X 3 subblock row and column sum equal to 0 2 3 6 or 7 and every 3 X 3 diagonal and antidiagonal sum not equal to 0 2 3 6 or 7.
A252108
Number of (n+2) X (2+2) 0..3 arrays with every 3 X 3 subblock row and column sum equal to 0 2 3 6 or 7 and every 3 X 3 diagonal and antidiagonal sum not equal to 0 2 3 6 or 7.
Terms
- a(0) =1929a(1) =1424a(2) =724a(3) =584a(4) =624a(5) =788a(6) =1180a(7) =1668a(8) =2472a(9) =3888a(10) =5640a(11) =8592a(12) =13920a(13) =20496a(14) =31776a(15) =52416a(16) =77856a(17) =121920a(18) =203136a(19) =303168a(20) =477312a(21) =799488a(22) =1196160a(23) =1888512a(24) =3171840a(25) =4751616a(26) =7512576a(27) =12635136a(28) =18940416a(29) =29967360
External references
- oeis: A252108