A210857 - OEIS

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A210857

Number of (n+1)X(n+1) 0..2 symmetric matrices with every 2X2 subblock having two or three distinct values, and new values 0..2 introduced in lower triangle row major order

4, 94, 6400, 1265336, 726175112, 1209791788480, 5850732722422240, 82137354029529991584, 3347356112567824150084288, 395998823277275732737683780672, 135993026862887355613684481546308800 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`1,1`
	LINKS	`R. H. Hardin, Table of n, a(n) for n = 1..14`
	EXAMPLE	`Some solutions for n=3` `..0..1..0..0....0..1..1..2....0..1..1..1....0..0..2..2....0..1..0..1` `..1..0..0..1....1..0..2..0....1..2..0..1....0..1..0..2....1..2..1..1` `..0..0..2..2....1..2..2..2....1..0..2..0....2..0..0..2....0..1..0..2` `..0..1..2..0....2..0..2..1....1..1..0..0....2..2..2..0....1..1..2..2`
	CROSSREFS	`Sequence in context: A221389 A220374 A220429 * A220682 A210926 A302121` `Adjacent sequences: A210854 A210855 A210856 * A210858 A210859 A210860`
	KEYWORD	`nonn`
	AUTHOR	`R. H. Hardin Mar 28 2012`
	STATUS	`approved`

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Last modified January 19 12:53 EST 2021. Contains 340269 sequences. (Running on oeis4.)