id:A128527 - OEIS Search Results

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Number of 5-indecomposable (connected) graphs on n nodes.

+0
4

1, 1, 1, 2, 6, 21, 112, 853, 11117, 261080, 3181, 6903, 16029, 37762, 60698, 136522, 295370, 617884, 1031444, 2148844, 4278884, 8230174, 13901726, 27183550, 50879126, 92491135, 155765543, 289049521, 515807289, 899791226, 1498906514, 2663076114, 4575392562, 7727941845, 12683646957, 21727344375, 36188012919, 59514326840, 96079635752, 159569603160 (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^3 - 5x^4 - 37x^5 + 38x^6 + 651x^7 + 10539x^8 + 259303x^9 + 548x^10 + 416x^11 + 286x^12.`
	CROSSREFS	`Cf. A126099, A128526, A128528` `Adjacent sequences: A128524 A128525 A128526 this_sequence A128528 A128529 A128530` `Sequence in context: A076326 A076327 A076328 this_sequence A128528 A001349 A126060`
	KEYWORD	`nonn`
	AUTHOR	`David Applegate (david(AT)research.att.com) and njas, Mar 07 2007`

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Last modified October 7 14:39 EDT 2008. Contains 144666 sequences.

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