id:A048619 - OEIS Search Results

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LCM of C(n,k) for all k is divisible by the central binomial coefficient. The quotients are listed.

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1, 1, 1, 2, 1, 3, 3, 4, 2, 10, 5, 30, 15, 7, 7, 56, 28, 252, 126, 60, 30, 330, 165, 396, 198, 286, 143, 2002, 1001, 15015, 15015, 7280, 3640, 1768, 884, 15912, 7956, 3876, 1938, 38760, 19380, 406980, 203490, 99484, 49742, 1144066, 572033, 1961256, 980628 (list; graph; listen)

	OFFSET	`1,4`
	LINKS	`Index entries for sequences related to lcm's`
	FORMULA	`a(n) = A002944(n)/A001405(n)` `a(n)=lcm(1..n+1)/(floor((n+3)/2)*C(n+1,floor((n+3)/2)); - Paul Barry (pbarry(AT)wit.ie), Jul 03 2006`
	EXAMPLE	`If n=10 then A002944(10)=2520, A001405(10)=252, the quotient a(10)=10`
	CROSSREFS	`A001405, A002944.` `Adjacent sequences: A048616 A048617 A048618 this_sequence A048620 A048621 A048622` `Sequence in context: A097686 A082666 A057938 this_sequence A116087 A116921 A093068`
	KEYWORD	`nonn`
	AUTHOR	`Labos E. (labos(AT)ana.sote.hu)`

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Last modified October 9 14:06 EDT 2008. Contains 144831 sequences.

AT&T Labs Research