A320421 Number of closed self-avoiding paths on square lattice with 2*n steps, A010566(n)/8.

0, 1, 3, 14, 70, 372, 2058, 11752, 68706, 409130, 2472646, 15127620, 93504944, 583032968, 3662883960, 23163461280, 147329432094, 941880843108, 6049001532148, 39007700026460, 252477751201074, 1639657957610596, 10680997864879592, 69772819359471480, 456959583009324200

Offset: 1

Author

Hugo Pfoertner, Jan 08 2019

Keywords

• nonn
• walk

Comments

Rotations and reflections of the path are counted only once, but see A266549 for further elimination of path isomorphisms.

References

• See A010566.

Crossrefs

Cf. A002931, A010566, A266549.