A269187 - OEIS

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A269187

Number of n X n 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 February 27 23:23 EST 2021. Contains 341694 sequences. (Running on oeis4.)