id:A108367 - OEIS Search Results

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L(n,-n), where L is defined as in A108299.

+0
3

1, -2, 5, -29, 265, -3191, 47321, -832040, 16908641, -389806471, 10049731549, -286482047279, 8946795882025, -303762892305614, 11140078609864049, -438857301101610929, 18482410314337295233, -828657053219851847135 (list; graph; listen)

	OFFSET	`0,2`
	COMMENT	`A108366 = L(n,n).`
	FORMULA	`a(n) = Prod(n + 2cos((2k-1)Pi/(2n+1)): 1<=k<=n) * (-1)^n with Pi=3.14....`
	CROSSREFS	`Cf. A000312.` `Sequence in context: A132282 A007014 A098682 this_sequence A103592 A098026 A064098` `Adjacent sequences: A108364 A108365 A108366 this_sequence A108368 A108369 A108370`
	KEYWORD	`sign`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Jun 01 2005`

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Last modified November 25 08:46 EST 2009. Contains 167481 sequences.

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