A297048 Number of edge covers in the n X n bishop graph.

0, 1, 168, 59706529, 393187796609898300, 640452934762921719920123363204929, 3953182835679963218417936393286738407349843878606730708, 1494965251274035901151835612145099097117648125436532015783603339637972099799668843761, 567739194652609242674354735113784587341360405864312182081785637035318428980909824192875939414508750046490358101678212604744

Offset

1,3

Links

Table of n, a(n) for n=1..9.

Eric Weisstein's World of Mathematics, Bishop Graph

Eric Weisstein's World of Mathematics, Edge Cover

Formula

a(n) = A297049(n) * A297050(n) for n > 1. - Andrew Howroyd, Dec 27 2017

Crossrefs

Cf. A297049, A297050.

Sequence in context: A008699 A223125 A003797 * A003929 A343269 A240069

Adjacent sequences: A297045 A297046 A297047 * A297049 A297050 A297051

Keyword

nonn

Author

Eric W. Weisstein, Dec 24 2017

Extensions

a(6)-a(8) from Andrew Howroyd, Dec 27 2017

a(9) from A297049(9) * A297050(9) from Eric W. Weisstein, Aug 05 2023

Status

approved