id:A100548 - OEIS Search Results

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Number of n-node labeled digraphs without endpoints.

+0
3

1, 1, 1, 28, 2539, 847126, 987474781, 4267529230672, 71328353711113801, 4706871807383903992060, 1236666872833000506726110479, 1297665884376581511952494336126664 (list; graph; listen)

	OFFSET	`0,4`
	FORMULA	`E.g.f.: exp(3/2x^2)Sum(2^(n(n-1))(x/exp(3*x))^n/n!, n=0..infinity).`
	CROSSREFS	`Cf. A059167.` `Sequence in context: A060335 A004705 A007219 this_sequence A103660 A107444 A061787` `Adjacent sequences: A100545 A100546 A100547 this_sequence A100549 A100550 A100551`
	KEYWORD	`nonn`
	AUTHOR	`Goran Kilibarda, Zoran Maksimovic, Vladeta Jovovic (vladeta(AT)Eunet.yu), Jan 02 2005`

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

AT&T Labs Research