id:A029699 - OEIS Search Results

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Number of words of length 4 in the n(n-1)/2 transpositions of S[ n ] equivalent to the identity.

+0
1

0, 1, 27, 120, 340, 765, 1491, 2632, 4320, 6705, 9955, 14256, 19812, 26845, 35595, 46320, 59296, 74817, 93195, 114760, 139860, 168861, 202147, 240120, 283200, 331825, 386451, 447552, 515620, 591165 (list; graph; listen)

	OFFSET	`1,3`
	FORMULA	`n(n-1)(3*n^2+n-12)/4`
	CROSSREFS	`Sequence in context: A143938 A042428 A158554 this_sequence A087795 A036927 A145555` `Adjacent sequences: A029696 A029697 A029698 this_sequence A029700 A029701 A029702`
	KEYWORD	`nonn`
	AUTHOR	`Paolo Dominici (pl.dm(AT)libero.it)`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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