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A039618 Number of 2n-step self-avoiding closed walks on first octant of 3-dimensional cubic lattice, passing through origin. 1
1, 0, 3, 18, 138, 1278, 13410, 154584, 1919352, 25273422, 348989058 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..10.

CROSSREFS

Sequence in context: A118970 A003122 A275549 * A183363 A216492 A127129

Adjacent sequences:  A039615 A039616 A039617 * A039619 A039620 A039621

KEYWORD

nonn,walk

AUTHOR

David W. Wilson

STATUS

approved

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Last modified November 18 01:20 EST 2018. Contains 317279 sequences. (Running on oeis4.)