Number of (n+2)X(3+2) 0..2 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 0 1 or 4.
A252288
Number of (n+2)X(3+2) 0..2 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 0 1 or 4.
Terms
- a(0) =2525a(1) =3848a(2) =8208a(3) =20558a(4) =59767a(5) =184998a(6) =596945a(7) =1992948a(8) =6773233a(9) =23197044a(10) =79852205a(11) =275695968a(12) =953357995a(13) =3299518458a(14) =11424073467a(15) =39564145732a(16) =137045937259a(17) =474760083732
External references
- oeis: A252288