A269187 - OEIS

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A269187

Number of nXn 0..3 arrays with some element plus some horizontally, diagonally, antidiagonally or vertically adjacent neighbor totalling three no more than once.

4, 108, 9284, 2817548, 3159954052, 13377149358556, 217602949665911156, 13760950074226562086140, 3411379570274317633099847884, 3335382860394625859139269051079788 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`1,1`
	COMMENTS	`Diagonal of A269194.`
	LINKS	`Table of n, a(n) for n=1..10.`
	EXAMPLE	`Some solutions for n=3` `..0..0..0. .2..2..0. .0..1..0. .2..2..2. .3..3..3. .1..3..2. .0..1..3` `..2..0..2. .3..2..0. .0..0..0. .0..0..2. .3..2..2. .1..1..3. .1..3..1` `..3..2..0. .3..2..0. .0..0..1. .0..2..0. .0..2..3. .3..3..3. .1..3..3`
	CROSSREFS	`Cf. A269194.` `Sequence in context: A090205 A061464 A107048 * A185702 A279046 A212803` `Adjacent sequences: A269184 A269185 A269186 * A269188 A269189 A269190`
	KEYWORD	`nonn`
	AUTHOR	`R. H. Hardin, Feb 20 2016`
	STATUS	`approved`

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Last modified October 23 09:45 EDT 2019. Contains 328345 sequences. (Running on oeis4.)