A297056 Number of edge covers in the n X n king graph.

0, 41, 559647, 2058903341490, 1919822469194024912961, 454793583387514185843536081792977, 27368974025724800737173203530619000355806000376, 418403166660689804867337021992321072270266489726877793864921013

Offset: 1

Author

Eric W. Weisstein, Dec 24 2017

Keywords

• nonn

Links

• Andrew Howroyd, Table of n, a(n) for n = 1..20
• Eric Weisstein's World of Mathematics, Edge Cover
• Eric Weisstein's World of Mathematics, King Graph

Crossrefs

Main diagonal of A297205.

Extensions

Terms a(4) and beyond from Andrew Howroyd, Dec 26 2017