id:A120346 - OEIS Search Results

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A120346

Number of permutations avoiding 3142, 25314, 246135 and 362514.

+0
1

1, 2, 6, 23, 102, 492, 2498, 13130, 70800, 389446, 2176802, 12328552, 70597568, 408061604, 2377643974, 13950607135, 82355028006, 488797440712, 2915087969496, 17459865132260, 104981190319396, 633438776314456 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`These permutations are the wreath closure of 1, 12, 21 and 2413.`
	LINKS	`R. Brignall, S. Huczynska and V. Vatter, Simple permutations and algebraic generating functions, arXiv:math.CO/0608391.`
	FORMULA	`G.f. satisfies f^5+f^4+f^2+(x-1)f+x=0.`
	EXAMPLE	`a(4)=23 because all permutations of length 4 except 3142 lies in this set.`
	CROSSREFS	`Sequence in context: A009449 A133656 A078487 this_sequence A050389 A098746 A088929` `Adjacent sequences: A120343 A120344 A120345 this_sequence A120347 A120348 A120349`
	KEYWORD	`nonn`
	AUTHOR	`Vince Vatter (vince(AT)mcs.st-and.ac.uk), Aug 16 2006`

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Last modified February 9 11:24 EST 2010. Contains 172296 sequences.

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