Number of nX2 arrays containing 2 copies of 0..n-1 with no element plus any horizontal, vertical, diagonal or antidiagonal neighbor equal to n-1.
A266207
Number of nX2 arrays containing 2 copies of 0..n-1 with no element plus any horizontal, vertical, diagonal or antidiagonal neighbor equal to n-1.
Terms
- a(0) =0a(1) =0a(2) =0a(3) =8a(4) =544a(5) =20976a(6) =3124800a(7) =269723136a(8) =61919980032
External references
- oeis: A266207