A181026 - OEIS

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A181026

Maximum number of 1s in an nX(n+2) binary matrix with no four 1s adjacent in a line along a row, column or diagonally.

3, 6, 12, 18, 25, 34, 44 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`1,1`
	LINKS	`Table of n, a(n) for n=1..7.`
	EXAMPLE	`Some solutions for 6X8` `..0..1..1..1..0..1..1..1....0..1..1..1..0..1..1..1....0..1..1..1..0..1..1..1` `..1..1..1..0..1..1..1..0....1..1..1..0..1..1..1..0....1..1..1..0..1..1..1..0` `..1..0..0..0..1..0..1..1....1..0..1..0..1..0..1..1....1..0..1..1..1..0..1..1` `..1..1..1..0..1..1..0..1....1..1..0..0..1..1..0..1....1..1..0..0..0..1..0..1` `..0..1..1..1..0..1..1..1....0..1..1..1..0..1..1..1....0..1..1..1..0..1..1..1` `..1..1..1..0..1..1..1..0....1..1..1..0..1..1..1..0....1..1..1..0..1..1..1..0`
	CROSSREFS	`Superdiagonal 2 of A181024.` `Sequence in context: A273015 A242297 A024513 * A180005 A116958 A242477` `Adjacent sequences: A181023 A181024 A181025 * A181027 A181028 A181029`
	KEYWORD	`nonn,more`
	AUTHOR	`R. H. Hardin, Sep 30 2010`
	STATUS	`approved`

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Last modified May 22 06:48 EDT 2024. Contains 372743 sequences. (Running on oeis4.)