id:A130105 - OEIS Search Results

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a(n)=(2n)!*B_n, B_n=n-th Bernoulli number.

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1, -1, 4, 0, -1344, 0, 11404800, 0, -697426329600, 0, 184310758195200000, 0, -157043899486325440512000, 0, 355703068713666170585088000000, 0, -1866165170959155879636916764672000000, 0 (list; graph; listen)

	OFFSET	`0,3`
	COMMENT	`a(n)=(2n)!*A027641(n)/A027642(n).`
	FORMULA	`a(n)=(2n)!sum{k=0..n,(1/(k+1))sum{j=0..k,(-1)^jC(k,j)j^n}};`
	CROSSREFS	`Adjacent sequences: A130102 A130103 A130104 this_sequence A130106 A130107 A130108` `Sequence in context: A013453 A012688 A012502 this_sequence A013463 A013464 A051390`
	KEYWORD	`easy,sign`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), May 07 2007`

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Last modified October 7 14:39 EDT 2008. Contains 144666 sequences.

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