A233255 - OEIS

The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

Thanks to everyone who made a donation during our annual appeal!
To see the list of donors, or make a donation, see the OEIS Foundation home page.

A233255

Number of nX7 0..5 arrays with no element x(i,j) adjacent to itself or value 5-x(i,j) horizontally or antidiagonally, top left element zero, and 1 appearing before 2 3 and 4, and 2 appearing before 3 in row major order (unlabelled 6-colorings with no clashing color pairs)

528, 1992704, 8050180096, 32835998056448, 134179300927602688, 548491734506604068864, 2242238966451009797226496, 9166394920089108387649814528, 37472795110784044637628292661248 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`1,1`
	COMMENTS	`Column 7 of A233256`
	LINKS	`R. H. Hardin, Table of n, a(n) for n = 1..210`
	FORMULA	`Empirical: a(n) = 5504a(n-1) -6438912a(n-2) +2774532096a(n-3) -478351982592a(n-4) +27831388078080*a(n-5)`
	EXAMPLE	`Some solutions for n=2` `..0..1..0..1..2..5..2....0..1..0..1..0..2..4....0..1..0..1..2..4..3` `..5..1..3..5..3..4..3....2..4..0..3..1..3..5....3..4..0..4..3..0..2`
	CROSSREFS	`Sequence in context: A263909 A233173 A233128 * A204684 A205160 A205309` `Adjacent sequences: A233252 A233253 A233254 * A233256 A233257 A233258`
	KEYWORD	`nonn`
	AUTHOR	`R. H. Hardin, Dec 06 2013`
	STATUS	`approved`

License Agreements, Terms of Use, Privacy Policy. .

Last modified January 18 21:06 EST 2021. Contains 340262 sequences. (Running on oeis4.)