id:A082681 - OEIS Search Results

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Denominator of sum_{i=n(n-1)/2+1..n(n+1)/2} 1/i.

+0
2

1, 6, 60, 2520, 20020, 1627920, 124324200, 1694579040, 446626220040, 73706596563600, 35444732266944, 24569517992362200, 3290057629552053360, 551042196782556679200, 71028805196838414285360 (list; graph; listen)

	OFFSET	`1,2`
	CROSSREFS	`Numerator is in A081971. a(n) is a divisor of A061431(n).` `Sequence in context: A001416 A003267 A010574 this_sequence A061431 A075069 A077682` `Adjacent sequences: A082678 A082679 A082680 this_sequence A082682 A082683 A082684`
	KEYWORD	`nonn,frac`
	AUTHOR	`Dean Hickerson (dean.hickerson(AT)yahoo.com), Apr 10 2003`

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Last modified December 13 23:45 EST 2009. Contains 170824 sequences.

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