id:A116704 - OEIS Search Results

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Number of permutations of length n which avoid the patterns 2341, 4312.

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1, 2, 6, 22, 86, 338, 1318, 5110, 19770, 76466, 295810, 1144530, 4428622, 17136186, 66306722, 256565926, 992749334, 3841316550, 14863484902, 57512368162, 222536820262, 861078033110, 3331832349354, 12892103081874, 49884359171762 (list; graph; listen)

	OFFSET	`1,2`
	LINKS	`Lara Pudwell, Systematic Studies in Pattern Avoidance, 2005.`
	FORMULA	`G.f.: A(x) = -{(x-1)(3x^3-5x^2+4x+1)x}/{-1+7x-17x^2+22x^3-13x^4+4x^5}`
	CROSSREFS	`Sequence in context: A116709 A116710 A116707 this_sequence A029759 A107243 A107244` `Adjacent sequences: A116701 A116702 A116703 this_sequence A116705 A116706 A116707`
	KEYWORD	`nonn,easy`
	AUTHOR	`Lara Pudwell (Lara.Pudwell(AT)valpo.edu), Feb 26 2006`

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Last modified November 18 20:14 EST 2008. Contains 147244 sequences.

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