id:A128528 - OEIS Search Results

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Number of 6-indecomposable (connected) graphs on n nodes.

+0
4

1, 1, 1, 2, 6, 21, 112, 853, 11117, 261080, 11716571, 1006700565, 164159, 422662, 1295037, 4272969, 12780650, 23303620, 64379033, 189490870, 556338383, 1448500351, 2871171041, 7624849834, 20914847051, 55714746424, 133364472272, 277569288280, 708402263349, 1827946074290, 4530654263579, 10312511072061, 22005420425661, 54057174050076, 132409684714581 (list; graph; listen)

	OFFSET	`1,4`
	COMMENT	`See A124593 for definition.`
	FORMULA	`G.f.: x/((1-x)(1-x^2)^2(1-x^3)^8(1-x^4)^44(1-x^5)^333) + 1 - x^3 - 5x^4 - 37x^5 - 295x^6 + 318x^7 + 9540x^8 + 255640x^9 + 11694624x^10 + 1006613825x^11 + 25539x^12 + 25593x^13 + 30877x^14 + 34220x^15`
	CROSSREFS	`Cf. A126099, A128526, A128527` `Sequence in context: A076327 A076328 A128527 this_sequence A001349 A126060 A110306` `Adjacent sequences: A128525 A128526 A128527 this_sequence A128529 A128530 A128531`
	KEYWORD	`nonn`
	AUTHOR	`David Applegate (david(AT)research.att.com) and njas, Mar 07 2007`

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Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.

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