A032037 - OEIS

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A032037

Doubles (index 2+) under "AIJ" (ordered, indistinct, labeled) transform.

1, 2, 18, 264, 5400, 141840, 4551120, 172529280, 7545363840, 373944211200, 20711190931200, 1267784551756800, 84991791159475200, 6193091146059417600, 487361761916020992000, 41192820513212239872000 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,2`
	LINKS	`INRIA Algorithms Project, Encyclopedia of Combinatorial Structures 92`
	FORMULA	`a(n) = n!*A001003(n-1). - Vladeta Jovovic (vladeta(AT)eunet.rs), Dec 06 2002`
	MATHEMATICA	`a[1]=1; a[2]=2; a[n_] := a[n]=3(2n-3)a[n-1]-(n-1)(n-3)a[n-2]`
	CROSSREFS	`Sequence in context: A099880 A141009 A143154 * A138275 A127134 A131455` `Adjacent sequences: A032034 A032035 A032036 * A032038 A032039 A032040`
	KEYWORD	`nonn`
	AUTHOR	`Christian G. Bower (bowerc(AT)usa.net)`

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Last modified February 14 18:05 EST 2012. Contains 205664 sequences.