id:A001188 - OEIS Search Results

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Number of even graphs with n edges.
(Formerly M1892 N0746)

+0
2

1, 2, 8, 60, 672, 9953, 184557, 4142631, 109813842, 3373122370, 118280690398, 4678086540493, 206625802351035, 10107719377251109, 543762148079927802 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`a(n) appears to be [A060639(n) + 1] / 2. - Ralf Stephan, Aug 21 2004`
	REFERENCES	`E. N. Gilbert, Enumeration of labeled graphs, Canad. J. Math., 8 (1956), 405-411.` `D. G. Cantor, personal communication.`
	CROSSREFS	`Sequence in context: A001415 A053871 A052622 this_sequence A113145 A036794 A096121` `Adjacent sequences: A001185 A001186 A001187 this_sequence A001189 A001190 A001191`
	KEYWORD	`nonn`
	AUTHOR	`njas`

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Last modified July 25 07:41 EDT 2008. Contains 142293 sequences.

AT&T Labs Research