A202631 - OEIS

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A202631

Number of n X n 0..3 arrays with adjacent row and column sums unequal

4, 184, 143028, 1960824272, 443471777729100 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`1,1`
	COMMENTS	`Diagonal of A202636`
	LINKS	`Table of n, a(n) for n=1..5.`
	EXAMPLE	`Some solutions for n=3` `..2..0..3....0..1..0....0..1..0....2..3..2....2..0..0....0..2..3....3..2..1` `..1..0..3....1..3..1....2..0..0....3..0..2....3..2..3....2..2..2....2..2..3` `..0..2..0....2..0..0....2..2..2....3..2..2....2..2..0....0..0..2....1..0..1`
	CROSSREFS	`Sequence in context: A174772 A146549 A156905 * A102194 A102191 A266492` `Adjacent sequences: A202628 A202629 A202630 * A202632 A202633 A202634`
	KEYWORD	`nonn`
	AUTHOR	`R. H. Hardin Dec 21 2011`
	STATUS	`approved`

Last modified January 25 01:37 EST 2020. Contains 331229 sequences. (Running on oeis4.)