A211929 - OEIS

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A211929

Number of lower triangular n X n arrays colored with integers 0 upwards introduced in row major order, with no element equal to any horizontal, vertical or antidiagonal neighbor, and containing the value n(n+1)/2-7

0, 0, 0, 6093, 8826873, 3020833719, 276214923832, 11092305676290 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`1,4`
	COMMENTS	`Column 6 of A211930`
	LINKS	`Table of n, a(n) for n=1..8.`
	EXAMPLE	`Some solutions for n=4` `..0........0........0........0........0........0........0........0` `..1.2......1.2......1.0......1.2......1.2......1.2......1.2......1.2` `..3.1.3....0.3.2....2.3.2....0.3.4....3.1.4....0.3.2....3.1.4....3.4.0` `..2.4.2.0..4.1.4.1..4.1.5.2..5.2.0.3..5.2.5.1..1.4.5.0..5.2.3.2..5.1.4.3`
	CROSSREFS	`Sequence in context: A252329 A156200 A236824 * A251994 A201225 A031619` `Adjacent sequences: A211926 A211927 A211928 * A211930 A211931 A211932`
	KEYWORD	`nonn`
	AUTHOR	`R. H. Hardin Apr 25 2012`
	STATUS	`approved`

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Last modified March 26 06:47 EDT 2023. Contains 361529 sequences. (Running on oeis4.)