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A118339 revision #17

A118339
Number of simple chains with n-1 edges strongly embedded in a simple cubic lattice.
2
1, 3, 15, 63, 267, 1107, 4623, 19071, 78987, 324543, 1337511, 5483235, 22527315, 92200455, 377965479, 1544925891, 6322891707
OFFSET
1,2
COMMENTS
Gaunt et al. also enumerate clusters with upper limits on the vertex degree.
a(n) is the number of fixed linear or snake polycubes of size n. - John Mason, Sep 27 2024
LINKS
D. S. Gaunt, J. L. Martin , G. Ord, G. M. Torrie, and S. G. Whittington, Restricted valence site animals on the simple cubic lattice, J. Phys. A: Math. Gen. 13 (1980) 1791-1797.
CROSSREFS
KEYWORD
nonn,more
AUTHOR
R. J. Mathar, May 14 2006
STATUS
editing