id:A111876 - OEIS Search Results

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Denominator of sum{k=0..n, 1/((k+1)(2k+1))}.

+0
3

1, 6, 30, 420, 1260, 13860, 180180, 72072, 1225224, 116396280, 116396280, 2677114440, 13385572200, 5736673800, 166363540200, 10314539492400, 10314539492400, 72201776446800, 2671465728531600, 2671465728531600 (list; graph; listen)

	OFFSET	`0,2`
	COMMENT	`Denominator of digamma(n+3/2)-digamma(n+2)+2ln(2). Numerator is A082687.`
	FORMULA	`a(n)=lcm(1..2n+2)/2; - Paul Barry (pbarry(AT)wit.ie), Jul 03 2006`
	CROSSREFS	`Sequence in context: A099031 A066108 A110374 this_sequence A119634 A075591 A130075` `Adjacent sequences: A111873 A111874 A111875 this_sequence A111877 A111878 A111879`
	KEYWORD	`easy,nonn,frac`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Aug 19 2005`

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Last modified December 17 23:40 EST 2009. Contains 171025 sequences.

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