id:A054481 - OEIS Search Results

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Highest common factor of successive highly composite numbers (1).

+0
4

1, 2, 2, 6, 12, 12, 12, 12, 60, 60, 60, 120, 360, 120, 420, 420, 840, 2520, 2520, 2520, 5040, 5040, 5040, 2520, 2520, 5040, 5040, 27720, 27720, 55440, 55440, 55440, 55440, 166320, 55440, 110880, 55440, 360360, 360360 (list; graph; listen)

	OFFSET	`2,2`
	FORMULA	`a(n) =GCD(A002182(n-1), A002182(n)) =A002182(n)/A054483(n) =A002182(n-1)/A054482(n)`
	EXAMPLE	`a(7)=12 because A002182(7)=36, A002182(6)=24 and GCD(36,24)=12`
	CROSSREFS	`Cf. A002182, A054482, A054483.` `Sequence in context: A036052 A091764 A079005 this_sequence A035615 A115962 A019311` `Adjacent sequences: A054478 A054479 A054480 this_sequence A054482 A054483 A054484`
	KEYWORD	`easy,nonn`
	AUTHOR	`Henry Bottomley (se16(AT)btinternet.com), Mar 31 2000`

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Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.

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