A199141 - OEIS

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A199141

Number of nXn 0..3 arrays with values 0..3 introduced in row major order and each element equal to one or two horizontal and vertical neighbors

0, 3, 132, 125468, 839006010, 44832664800117 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`1,2`
	COMMENTS	`Diagonal of A199149`
	LINKS	`Table of n, a(n) for n=1..6.`
	EXAMPLE	`Some solutions for n=4` `..0..0..1..1....0..0..1..1....0..0..1..1....0..1..1..1....0..0..1..1` `..1..1..0..0....2..2..3..3....1..1..1..0....0..0..2..2....2..3..3..0` `..2..2..0..3....2..2..0..0....2..0..0..0....2..2..3..2....2..0..0..0` `..0..0..3..3....0..0..2..2....2..2..2..2....1..1..3..2....3..3..3..3`
	CROSSREFS	`Sequence in context: A090540 A048796 A213203 * A152435 A157086 A051376` `Adjacent sequences: A199138 A199139 A199140 * A199142 A199143 A199144`
	KEYWORD	`nonn`
	AUTHOR	`R. H. Hardin Nov 03 2011`
	STATUS	`approved`

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Last modified May 23 09:42 EDT 2013. Contains 225586 sequences.