id:A116800 - OEIS Search Results

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Number of permutations of length n which avoid the patterns 1432, 2314, 3241.

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1, 2, 6, 21, 72, 232, 712, 2116, 6155, 17629, 49893, 139851, 388899, 1074280, 2950885, 8066698, 21960083, 59566264, 161060160, 434269077, 1168017399, 3134554480, 8395344424, 22445226508, 59911148129, 159681826564 (list; graph; listen)

	OFFSET	`1,2`
	LINKS	`Lara Pudwell, Systematic Studies in Pattern Avoidance, 2005.`
	FORMULA	`G.f.: A(x) = {(x^5-3x^4+7x^3-10x^2+5x-1)x}/{(3x^3-5x^2+4x-1)(x^2-3x+1)}`
	CROSSREFS	`Sequence in context: A116830 A116747 A116810 this_sequence A116758 A116838 A116836` `Adjacent sequences: A116797 A116798 A116799 this_sequence A116801 A116802 A116803`
	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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