Number of (n+2)X(5+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.
A251776
Number of (n+2)X(5+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) =12302a(1) =132886a(2) =748002a(3) =3849230a(4) =39849294a(5) =247384810a(6) =1341002006a(7) =13904412166a(8) =89606678130a(9) =502599987230
External references
- oeis: A251776