A351994 - OEIS

A351994

Number of spanning trees in a hexagon of size n in the triangular grid.

1, 320, 2300606464, 289899537900576358400, 614482906548854364363387716704247808, 21564742087547836976004856537464240189331001616154755072, 12433415382338420812828401445037903120443542018197863908895102595928462876835840

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OFFSET

0,2

COMMENTS

The hexagon of size n in the triangular grid has A003215(n) vertices.

LINKS

Table of n, a(n) for n=0..6.

Peter Kagey, Image of one of the a(4) = 614482906548854364363387716704247808 spanning trees of size 4.

CROSSREFS

Cf. A007341 (square in square grid), A116469 (rectangle in square grid), A174579 (triangle in triangular grid), A351888 (triangle in hexagonal grid), A352022 (hexagon in hexagonal grid).

Sequence in context: A264063 A174778 A300849 * A261262 A308527 A268517

Adjacent sequences: A351991 A351992 A351993 * A351995 A351996 A351997

KEYWORD

nonn

AUTHOR

Peter Kagey, Feb 28 2022

STATUS

approved