id:A052140 - OEIS Search Results

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4^n*n!^2*Sum_{k=0..n} 1/k!.

+0
1

1, 8, 160, 6144, 399360, 40058880, 5771427840, 1131282432000, 289610945003520, 93834041307955200, 37533620328254668800, 18166272406298453606400, 10463772914064222584832000, 7073510490325302759338803200, 5545632224438439107673194496000 (list; graph; listen)

	OFFSET	`0,2`
	REFERENCES	`R. P. Stanley, Enumerative Combinatorics, Cambridge, Vol. 2, 1999; see Problem 5.64(d).`
	CROSSREFS	`Sequence in context: A114223 A127369 A036909 this_sequence A064755 A140337 A065116` `Adjacent sequences: A052137 A052138 A052139 this_sequence A052141 A052142 A052143`
	KEYWORD	`nonn`
	AUTHOR	`njas, Jan 23 2000`

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Last modified July 25 07:41 EDT 2008. Contains 142293 sequences.

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