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A259855 Bridging trails on square lattice. 0
1, 3, 7, 17, 41, 101, 259, 669, 1731, 4499, 11705, 30623, 80443, 211851, 558999, 1477983, 3914393, 10384023, 27585099, 73366563, 195341557, 520640553 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..22.

A. J. Guttmann, Lattice trails II: numerical results, J. Phys. A 22 (1989), 575-588.

CROSSREFS

Sequence in context: A089742 A187258 A131721 * A058351 A244782 A175094

Adjacent sequences:  A259852 A259853 A259854 * A259856 A259857 A259858

KEYWORD

nonn,more

AUTHOR

N. J. A. Sloane, Jul 07 2015

STATUS

approved

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Last modified August 5 10:38 EDT 2021. Contains 346466 sequences. (Running on oeis4.)