A196011 - OEIS

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A196011

Number of n X n 0..4 arrays with each element equal to the number of its horizontal and vertical neighbors within one of itself

1, 1, 2, 25, 106, 708, 22711, 670449, 44864449, 5122273171, 1106078073333, 426788297174150 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`1,3`
	COMMENTS	`Diagonal of A196017`
	LINKS	`Table of n, a(n) for n=1..12.`
	EXAMPLE	`Some solutions for n=4` `..2..3..2..2....2..3..2..0....0..2..3..2....0..2..2..2....2..2..3..2` `..3..3..0..2....3..4..3..2....2..3..4..3....2..3..0..2....2..0..3..3` `..3..4..3..2....2..3..0..2....2..0..3..2....3..4..3..2....2..3..4..3` `..2..3..2..0....0..2..2..2....2..2..2..0....2..3..2..0....0..2..3..2`
	CROSSREFS	`Sequence in context: A123012 A175522 A226418 * A080515 A258943 A009381` `Adjacent sequences: A196008 A196009 A196010 * A196012 A196013 A196014`
	KEYWORD	`nonn`
	AUTHOR	`R. H. Hardin Sep 26 2011`
	STATUS	`approved`

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Last modified March 25 23:47 EDT 2023. Contains 361529 sequences. (Running on oeis4.)