id:A087801 - OEIS Search Results

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Greatest common divisor of tau(n)+sigma(n) and tau(n)*sigma(n), where tau=A000005 and sigma=A000203.

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1, 1, 2, 1, 4, 16, 2, 1, 1, 2, 2, 2, 4, 4, 4, 1, 4, 9, 2, 12, 4, 8, 2, 4, 1, 2, 4, 2, 4, 16, 2, 3, 4, 2, 4, 1, 4, 16, 4, 2, 4, 8, 2, 18, 12, 4, 2, 2, 3, 9, 4, 4, 4, 64, 4, 64, 4, 2, 2, 36, 4, 4, 2, 1, 8, 8, 2, 12, 4, 8, 2, 9, 4, 2, 2, 2, 4, 16, 2, 4, 1, 2, 2, 4, 16, 8, 4, 4, 4, 6, 4, 6, 4, 4, 4, 24 (list; graph; listen)

	OFFSET	`1,3`
	COMMENT	`a(n) = GCD(A007503(n), A064840(n)).`
	CROSSREFS	`Cf. A009205, A009191, A009194.` `Adjacent sequences: A087798 A087799 A087800 this_sequence A087802 A087803 A087804` `Sequence in context: A006173 A102055 A032174 this_sequence A025228 A132945 A013156`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Oct 11 2003`

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

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