A287248 Number of matchings in the n X n bishop graph.

1, 4, 84, 16900, 39932844, 1361720957184, 774585118899294568, 8454365006540284439239696, 1984702974673190711327564424138048, 11162924792761237570313905721795529333447744, 1649914801339506800304019030963996680128410488784164960, 6996584578812582654135225585307693014250183123864863361126056356416, 919794116459365136444247186352581193250325236478988411540394596132809895149151936

Offset

1,2

Links

Table of n, a(n) for n=1..13.

Eric Weisstein's World of Mathematics, Bishop Graph

Eric Weisstein's World of Mathematics, Independent Edge Set

Eric Weisstein's World of Mathematics, Matching

Formula

a(n) = A286422(n) * A286423(n). - Andrew Howroyd, May 23 2017

Crossrefs

Cf. A286422, A286423.

Sequence in context: A367522 A015018 A204245 * A225164 A229185 A360741

Adjacent sequences: A287245 A287246 A287247 * A287249 A287250 A287251

Keyword

nonn

Author

Eric W. Weisstein, May 22 2017

Status

approved