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A121788
"Crossing Hamiltonian walks" on the square lattice (see Jensen web site for further information).
3
2, 2, 32, 104, 10180, 111712, 67590888, 2688307514, 9628765945000, 1445778936756068, 29725924602729604016, 17337631013706758184626, 1998903003325610328086958408, 4628650743368437273677525554148
OFFSET
1,1
LINKS
I. Jensen, Table of n, a(n) for n = 1..17 [from the Jensen link below]
CROSSREFS
Sequence in context: A353911 A303568 A353928 * A018976 A074127 A297795
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Aug 30 2006
STATUS
approved