Number of (n+2)X(3+2) 0..3 arrays with every 3X3 subblock row and column sum 3 or 6 and every diagonal and antidiagonal sum not 3 or 6.
A251774
Number of (n+2)X(3+2) 0..3 arrays with every 3X3 subblock row and column sum 3 or 6 and every diagonal and antidiagonal sum not 3 or 6.
Terms
- a(0) =2402a(1) =12242a(2) =43778a(3) =144818a(4) =748002a(5) =2861058a(6) =9758786a(7) =51133714a(8) =198564354a(9) =686684594a(10) =3603903074a(11) =14088001090a(12) =48981683138a(13) =257125287186
External references
- oeis: A251774