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A297059 Number of edge covers in the n X n rook graph. 0
0, 7, 156492, 221223005569649, 1151204909283644125337234622000 (list; graph; refs; listen; history; text; internal format)
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

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Last modified May 11 19:29 EDT 2021. Contains 343808 sequences. (Running on oeis4.)