A121789 "Spanning Hamiltonian walks" on the square lattice (see Jensen web site for further information).

2, 8, 34, 650, 12014, 1016492, 83761994, 32647369000, 12227920752840, 22181389298814376, 38166266554504010420, 323646210116765453608746, 2574827340090912815899810042, 102299512403818451392332665527950

Offset

1,1

Comments

Number of Hamiltonian paths in the graph P_{n+1} X P_{n+1} starting at any of the n+1 vertices on one side of the graph and terminating at any of the n+1 vertices on the opposite side. - Andrew Howroyd, Apr 10 2016

Links

I. Jensen, Table of n, a(n) for n = 1..18 [from the Jensen link below]

I. Jensen, Series Expansions for Self-Avoiding Walks

I. Jensen, Spanning Hamiltonian walks

Crossrefs

Cf. A120443, A121785, A215527.

Sequence in context: A229812 A346413 A013026 * A057900 A116618 A037723

Adjacent sequences: A121786 A121787 A121788 * A121790 A121791 A121792

Keyword

nonn

Author

N. J. A. Sloane, Aug 30 2006

Status

approved