A211915 - OEIS

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A211915

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, diagonal or antidiagonal neighbor, and containing the value n(n+1)/2-6

0, 0, 10, 1732, 1085432, 146208485, 6410611003, 140836842878 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`1,3`
	COMMENTS	`Column 5 of A211916`
	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......1.2......1.2......1.2......1.2......1.2......1.2` `..3.4.1....3.0.3....0.3.4....3.4.0....3.4.5....3.0.4....0.3.1....3.0.4` `..1.0.5.3..2.4.5.6..5.1.6.3..5.1.5.3..2.1.0.3..5.2.6.0..2.4.2.4..4.5.3.6`
	CROSSREFS	`Sequence in context: A203530 A232594 A194793 * A182326 A160303 A336666` `Adjacent sequences: A211912 A211913 A211914 * A211916 A211917 A211918`
	KEYWORD	`nonn`
	AUTHOR	`R. H. Hardin Apr 25 2012`
	STATUS	`approved`

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Last modified August 15 18:38 EDT 2022. Contains 356148 sequences. (Running on oeis4.)