A270247 Number of matchings in the n X n torus grid graph C_n X C_n.

1, 7, 370, 41025, 15637256, 23079663560, 127193770624285, 2645142169931308801, 206932904585998805434690, 60953421285412135689567940992, 67583556205239600880061198746186383, 282092296203355454009618109524478429807744

Offset

1,2

Comments

C_{n} X C_{n} is also known as the (n,n)-torus grid graph.

Links

Table of n, a(n) for n=1..12.

Eric Weisstein's World of Mathematics, Matching.

Eric Weisstein's World of Mathematics, Torus Grid Graph.

Crossrefs

Cf. A270246, A102080, A028420, A270228, A027683, A228316, A222199.

Sequence in context: A145181 A221353 A222870 * A270228 A082443 A082624

Adjacent sequences: A270244 A270245 A270246 * A270248 A270249 A270250

Keyword

nonn

Author

Andrew Howroyd, Mar 13 2016

Status

approved