id:A116797 - OEIS Search Results

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Number of permutations of length n which avoid the patterns 1432, 2134, 2314.

+0
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1, 2, 6, 21, 73, 241, 768, 2415, 7587, 23905, 75507, 238759, 755088, 2387570, 7548085, 23860518, 75425046, 238427267, 753705647, 2382596754, 7531821990, 23809446690, 75265885442, 237928695207, 752134317626, 2377628496399 (list; graph; listen)

	OFFSET	`1,2`
	LINKS	`Lara Pudwell, Systematic Studies in Pattern Avoidance, 2005.`
	FORMULA	`G.f.: A(x) = -{(3x^5-4x^4+4x^3-7x^2+4x-1)x}/{4x^6-7x^5+9x^4-15x^3+13x^2-6x+1}`
	CROSSREFS	`Sequence in context: A116741 A116843 A116822 this_sequence A116744 A116784 A116802` `Adjacent sequences: A116794 A116795 A116796 this_sequence A116798 A116799 A116800`
	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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