Number of (1+2)X(n+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 0 3 5 6 or 8 and every 3X3 column and antidiagonal sum not equal to 0 3 5 6 or 8.
A252616
Number of (1+2)X(n+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 0 3 5 6 or 8 and every 3X3 column and antidiagonal sum not equal to 0 3 5 6 or 8.
Terms
- a(0) =614a(1) =1051a(2) =1717a(3) =3235a(4) =6403a(5) =12421a(6) =25137a(7) =50144a(8) =99378a(9) =200999a(10) =401361a(11) =798362a(12) =1616155a(13) =3230992a(14) =6434910a(15) =13040208a(16) =26096798a(17) =52010678a(18) =105477211a(19) =211254469a(20) =421231460a(21) =854657745a(22) =1712778293a(23) =3416431696a(24) =6933759691a(25) =13902078766
External references
- oeis: A252616