A039618 Number of 2n-step self-avoiding closed walks on first octant of 3-dimensional cubic lattice, passing through origin.

1, 0, 3, 18, 138, 1278, 13410, 154584, 1919352, 25273422, 348989058, 5011939788, 74393974476, 1135821378924

Offset: 0

Author

David W. Wilson

Keywords

• nonn
• walk
• hard
• more

Links

• Sean A. Irvine, Java program (github)

Crossrefs

Cf. A001409, A034010.

Extensions

a(11)-a(13) from Sean A. Irvine, Feb 19 2021