A222787 - OEIS

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A222787

Number of n X n 0..3 arrays with exactly floor(n X n/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..3 order

1, 3, 34, 5896, 1615706, 8113737592, 39461160617203, 3271351045573714833, 264112864034567015904268 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`1,2`
	COMMENTS	`Diagonal of A222794`
	LINKS	`Table of n, a(n) for n=1..9.`
	EXAMPLE	`Some solutions for n=3` `..0..0..0....0..0..0....0..0..0....0..0..1....0..1..1....0..0..0....0..0..0` `..0..0..1....0..0..1....0..0..1....2..3..3....2..1..1....1..2..2....0..0..0` `..0..0..2....2..0..0....1..0..0....3..3..3....1..1..1....2..2..2....1..0..2`
	CROSSREFS	`Sequence in context: A194891 A194892 A182382 * A180126 A214854 A054287` `Adjacent sequences: A222784 A222785 A222786 * A222788 A222789 A222790`
	KEYWORD	`nonn`
	AUTHOR	`R. H. Hardin Mar 05 2013`
	STATUS	`approved`

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Last modified July 6 09:32 EDT 2022. Contains 355108 sequences. (Running on oeis4.)