A207980 - OEIS

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A207980

Number of nX4 nonnegative integer arrays with new values 0 upwards introduced in row major order and no element equal to any diagonal or antidiagonal neighbor (colorings ignoring permutations of colors)

15, 1080, 587208, 953124784, 3410310590912, 22727131144960768, 253335104721267417984 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`1,1`
	COMMENTS	`Column 4 of A207981`
	LINKS	`Table of n, a(n) for n=1..7.`
	EXAMPLE	`Some solutions for n=4` `..0..0..0..0....0..1..0..0....0..0..0..0....0..0..1..0....0..0..0..0` `..1..1..2..1....2..1..2..1....1..1..2..1....1..2..1..0....1..1..1..1` `..0..3..0..0....0..0..0..0....2..0..0..0....0..0..1..0....2..0..0..0` `..4..1..1..1....1..1..1..1....1..1..1..2....2..2..1..0....1..1..1..1`
	CROSSREFS	`Sequence in context: A233509 A206162 A203409 * A131313 A208346 A236329` `Adjacent sequences: A207977 A207978 A207979 * A207981 A207982 A207983`
	KEYWORD	`nonn`
	AUTHOR	`R. H. Hardin Feb 22 2012`
	STATUS	`approved`

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Last modified July 4 20:08 EDT 2022. Contains 355086 sequences. (Running on oeis4.)