id:A132220 - OEIS Search Results

Search: id:A132220

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Number of line graphs on n unlabeled nodes.

+0
2

1, 2, 4, 10, 24, 63, 166, 471, 1408, 4436, 14719, 51468, 188754, 725010, 2907576, 12141462, 52654529, 236584104, 1098926868, 5266708497, 25997964452, 131975740172, 688019138485, 3678898458587 (list; graph; listen)

	OFFSET	`1,2`
	FORMULA	`Euler transform of A003089.`
	CROSSREFS	`Cf. A132219(labeled case).` `Sequence in context: A138175 A121691 A124499 this_sequence A007874 A121704 A049144` `Adjacent sequences: A132217 A132218 A132219 this_sequence A132221 A132222 A132223`
	KEYWORD	`nonn`
	AUTHOR	`Vladeta Jovovic (vladeta(AT)Eunet.yu), Aug 14 2007`

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Last modified December 3 01:16 EST 2008. Contains 151161 sequences.

AT&T Labs Research