A187955 - OEIS

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A187955

Half the number of (n+2)X(n+2) binary arrays with no 3X3 subblock having a sum equal to any horizontal or vertical neighbor 3X3 subblock sum

256, 8768, 359488, 15189800, 1218772461 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`1,1`
	COMMENTS	`Diagonal of A187964`
	LINKS	`Table of n, a(n) for n=1..5.`
	EXAMPLE	`Some solutions for 4X4 with a(1,1)=0` `..0..1..1..1....0..0..1..1....0..0..0..1....0..0..0..1....0..0..0..0` `..0..1..0..1....1..1..1..1....0..1..1..1....1..1..0..1....1..1..1..0` `..1..0..1..1....0..0..0..0....0..1..1..1....0..1..0..1....0..1..1..0` `..0..0..1..0....1..1..0..0....1..1..1..0....0..1..0..1....0..1..0..0`
	CROSSREFS	`Sequence in context: A179645 A056585 A206129 * A128991 A191680 A191496` `Adjacent sequences: A187952 A187953 A187954 * A187956 A187957 A187958`
	KEYWORD	`nonn`
	AUTHOR	`R. H. Hardin Mar 16 2011`
	STATUS	`approved`

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Last modified May 20 21:01 EDT 2013. Contains 225464 sequences.