A143874 - OEIS

This site is supported by donations to The OEIS Foundation.

A143874

Number of ways of placing kings with no more than 1 mutual attack on an n X n chessboard symmetric under 180 degree rotation.

1, 2, 3, 7, 18, 111, 497, 4630, 38327, 702227, 10398834 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,2`
	CROSSREFS	`Sequence in context: A100388 A186232 A160181 * A073641 A117763 A165571` `Adjacent sequences: A143871 A143872 A143873 * A143875 A143876 A143877`
	KEYWORD	`nonn`
	AUTHOR	`R. H. Hardin (rhhardin(AT)att.net), Sep 04 2008`

Content is available under The OEIS End-User License Agreement .

Last modified February 17 09:17 EST 2012. Contains 206009 sequences.