login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A287227 Number of independent vertex sets and vertex covers in the n X n queen graph. 0
2, 5, 18, 87, 462, 2635, 16870, 118969, 915442, 7535369 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..10.

Eric Weisstein's World of Mathematics, Independent Vertex Set

Eric Weisstein's World of Mathematics, Queen Graph

Eric Weisstein's World of Mathematics, Vertex Cover

CROSSREFS

Sequence in context: A020119 A109995 A142153 * A094294 A005500 A020025

Adjacent sequences:  A287224 A287225 A287226 * A287228 A287229 A287230

KEYWORD

nonn

AUTHOR

Eric W. Weisstein, May 22 2017

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified July 27 18:27 EDT 2021. Contains 346308 sequences. (Running on oeis4.)