id:A093394 - OEIS Search Results

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GCD of n and the product of the anti-divisors of n.

+0
3

1, 1, 1, 2, 1, 1, 3, 2, 1, 4, 1, 2, 15, 1, 1, 6, 1, 4, 21, 2, 1, 8, 5, 2, 27, 4, 1, 30, 1, 1, 33, 2, 35, 12, 1, 2, 39, 8, 1, 42, 1, 4, 45, 2, 1, 16, 7, 10, 51, 4, 1, 54, 55, 8, 57, 2, 1, 60, 1, 2, 63, 1, 65, 66, 1, 4, 69, 70, 1, 24, 1, 2, 75, 4 (list; graph; listen)

	OFFSET	`3,4`
	COMMENT	`See A066272 for definition of anti-divisor.`
	FORMULA	`a(n) = GCD(n, A091507(n))`
	EXAMPLE	`The anti-divisors of 18 are 4, 5, 7, 12. Hence a(18) = GCD(457*12, 18) = 6.`
	CROSSREFS	`Cf. A066417, A091507, A093395, A093396.` `Sequence in context: A025831 A079673 A124829 this_sequence A094363 A124832 A137569` `Adjacent sequences: A093391 A093392 A093393 this_sequence A093395 A093396 A093397`
	KEYWORD	`nonn`
	AUTHOR	`Lior Manor (lior.manor(AT)gmail.com) Mar 28 2004`

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Last modified December 6 11:04 EST 2009. Contains 170427 sequences.

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