Number of (n+2)X(4+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.
A251775
Number of (n+2)X(4+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) =4790a(1) =34934a(2) =144818a(3) =524774a(4) =3849230a(5) =16580426a(6) =60326174a(7) =447979046a(8) =1931849642a(9) =7044376358a(10) =52367746670a(11) =225917404970a(12) =823970129438
External references
- oeis: A251775