A199942 - OEIS

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A199942

Number of -7..7 arrays x(0..n-1) of n elements with zeroth through n-1st differences all nonzero

14, 182, 2294, 28490, 351148, 4310382, 52799912, 646091920, 7901341926 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`1,1`
	COMMENTS	`Column 7 of A199943`
	LINKS	`Table of n, a(n) for n=1..9.`
	EXAMPLE	`Some solutions for n=6` `.-7...-7....1....1...-7...-7...-7...-7...-7....1...-7...-7...-7...-7....1...-7` `..2....1...-7...-6...-6....1...-6...-6....2...-6....2....2....1...-6...-7....1` `..7....6....7...-4....2....7...-4...-3....4...-3...-6....4...-2....3....2....7` `.-4...-7....2....1....6...-2...-6....6...-2....7...-1....5....2...-2...-5....1` `.-2....6....3...-2...-7....5...-3....4....2...-3...-6...-7....4....4....6...-1` `..2....3...-4....3....5....1...-2...-1....7...-5....5....2....7....5...-1...-7`
	CROSSREFS	`Sequence in context: A133286 A163416 A162783 * A097828 A030008 A163090` `Adjacent sequences: A199939 A199940 A199941 * A199943 A199944 A199945`
	KEYWORD	`nonn`
	AUTHOR	`R. H. Hardin Nov 12 2011`
	STATUS	`approved`

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Last modified May 25 04:27 EDT 2013. Contains 225638 sequences.