A221292 - OEIS

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A221292

Equals two maps: number of 4Xn binary arrays indicating the locations of corresponding elements equal to exactly two of their horizontal and antidiagonal neighbors in a random 0..3 4Xn array

1, 37, 556, 9107, 172904, 2890017, 49684593, 821323042, 13475380990 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`1,2`
	COMMENTS	`Row 4 of A221290`
	LINKS	`Table of n, a(n) for n=1..9.`
	EXAMPLE	`Some solutions for n=3` `..0..1..0....0..0..0....0..0..1....0..1..0....0..1..1....0..1..0....0..0..1` `..0..0..0....0..1..0....0..1..0....0..1..0....1..1..0....1..0..0....1..0..0` `..1..1..0....0..1..1....1..1..1....1..0..0....0..0..0....0..0..1....0..1..1` `..0..0..0....1..1..0....0..0..0....0..1..0....1..1..0....0..0..0....1..0..0`
	CROSSREFS	`Sequence in context: A219440 A219141 A220938 * A231514 A156226 A217501` `Adjacent sequences: A221289 A221290 A221291 * A221293 A221294 A221295`
	KEYWORD	`nonn`
	AUTHOR	`R. H. Hardin Jan 09 2013`
	STATUS	`approved`

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Last modified March 23 23:09 EDT 2023. Contains 361454 sequences. (Running on oeis4.)