id:A116709 - OEIS Search Results

Search: id:A116709

Displaying 1-1 of 1 results found.

page 1

Number of permutations of length n which avoid the patterns 2341, 4213.

+0
1

1, 2, 6, 22, 86, 336, 1290, 4870, 18164, 67234, 247786, 911120, 3346618, 12286942, 45104548, 165573482, 607817410, 2231360192, 8191763970, 30074097062, 110410946820, 405353571346, 1488185247962, 5463619641904, 20058759689642 (list; graph; listen)

	OFFSET	`1,2`
	LINKS	`Lara Pudwell, Systematic Studies in Pattern Avoidance, 2005.`
	FORMULA	`G.f.: A(x) = -{(2x^4-7x^3+12x^2-6x+1)x}/{2x^5-10x^4+25x^3-22x^2+8x-1}`
	CROSSREFS	`Sequence in context: A116705 A116708 A116706 this_sequence A116710 A116707 A116704` `Adjacent sequences: A116706 A116707 A116708 this_sequence A116710 A116711 A116712`
	KEYWORD	`nonn,easy`
	AUTHOR	`Lara Pudwell (Lara.Pudwell(AT)valpo.edu), Feb 26 2006`

page 1

Search completed in 0.002 seconds

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

AT&T Labs Research