A323140 Number of uncrossed king's paths of length n, reduced for symmetry, A272773/8.

1, 7, 45, 280, 1712, 10351, 62082, 370142, 2196701, 12988928, 76572159, 450277842, 2642226994, 15476427641, 90508059371

Offset: 1

Author

Hugo Pfoertner, Jan 05 2019

Keywords

• nonn
• hard
• more

Comments

For comments, programs, references see A272773.

Crossrefs

Cf. A272773, A003192, A046661, A323141.

Formula

a(n) = A272773(n) / 8.