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

1,2

Links

Table of n, a(n) for n=1..36.

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

Crossrefs

Cf. A001334, A151541.

Sequence in context: A026891 A064140 A064139 * A026744 A347257 A123765

Adjacent sequences: A306173 A306174 A306175 * A306177 A306178 A306179

Keyword

nonn,walk

Author

Hugo Pfoertner, Jun 25 2018

Extensions

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

Status

approved