A306176 Number of symmetric unrooted self-avoiding walks of n steps on hexagonal lattice.

1, 3, 4, 12, 18, 50, 78, 208, 337, 867, 1440, 3613, 6133, 15058, 26037, 62756, 110274, 261524, 466183, 1089717, 1967725, 4540103, 8294946, 18913123, 34929064, 78778601, 146943175, 328097471, 617667052, 1366311508, 2594446392, 5689203511, 10890701272, 23687039917, 45689624111, 98612105026

Offset: 1

Author

Hugo Pfoertner, Jun 25 2018

Keywords

• nonn
• walk

Links

• Hugo Pfoertner, Illustration of walks of lengths <= 7.

Crossrefs

Cf. A001334, A151541.

Extensions

a(10)-a(36) from Bert Dobbelaere, Mar 23 2025