A297059 Number of edge covers in the n X n rook graph.

0, 7, 156492, 221223005569649, 1151204909283644125337234622000

Offset

1,2

Links

Table of n, a(n) for n=1..5.

Eric Weisstein's World of Mathematics, Edge Cover

Eric Weisstein's World of Mathematics, Rook Graph

Crossrefs

Sequence in context: A013842 A247791 A243859 * A306256 A145322 A145335

Adjacent sequences: A297056 A297057 A297058 * A297060 A297061 A297062

Keyword

nonn,more

Author

Eric W. Weisstein, Dec 24 2017

Extensions

a(4)-a(5) from Andrew Howroyd, Dec 27 2017

Status

approved