id:A140963 - OEIS Search Results

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Half the number of n X n symmetric binary matrices with each 1 adjacent to an even number of other 1's.

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1, 3, 14, 99, 1082, 17997, 460186, 17967189, 1075650798, 98475760770, 13808877966564, 2962829880373443, 973285891955586078, 489313659027753121941, 376571597820325396861232 (list; graph; listen)

	OFFSET	`1,2`
	LINKS	`Ron Hardin (rhhardin(AT)att.net), Jul 27 2008, Table of n, a(n) for n = 1..21`
	CROSSREFS	`Sequence in context: A074515 A038051 A132008 this_sequence A076015 A004659 A054202` `Adjacent sequences: A140960 A140961 A140962 this_sequence A140964 A140965 A140966`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net), Jul 27 2008`

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Last modified November 29 12:46 EST 2009. Contains 167659 sequences.

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