A213596 - OEIS

A213596

Number of n X n binary matrices with zero diagonal and x(i,j), x(j,k) and x(k,i) not all equal for i,j,k all different

1, 4, 36, 450, 5172, 75204, 1353240, 27948312 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`1,2`
	LINKS	`Table of n, a(n) for n=1..8.`
	EXAMPLE	`Some solutions for n=4` `..0..1..1..1....0..0..0..0....0..1..1..1....0..0..1..1....0..0..0..1` `..1..0..0..1....1..0..0..0....0..0..1..1....0..0..1..1....0..0..1..1` `..0..0..0..1....1..1..0..1....0..1..0..0....1..1..0..0....1..1..0..0` `..0..0..1..0....1..1..0..0....0..0..0..0....0..1..0..0....1..1..0..0`
	CROSSREFS	`Sequence in context: A136224 A321963 A307903 * A009533 A135906 A197446` `Adjacent sequences: A213593 A213594 A213595 * A213597 A213598 A213599`
	KEYWORD	`nonn`
	AUTHOR	`R. H. Hardin Jun 15 2012`
	STATUS	`approved`

Last modified April 1 13:29 EDT 2023. Contains 361695 sequences. (Running on oeis4.)