id:A069896 - OEIS Search Results

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GCD of consecutive values of Chowla-function.

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1, 0, 2, 2, 5, 5, 6, 3, 1, 7, 15, 15, 9, 1, 2, 14, 20, 20, 21, 1, 1, 13, 35, 5, 5, 3, 3, 27, 41, 41, 30, 2, 1, 1, 6, 54, 21, 1, 1, 49, 53, 53, 39, 1, 1, 25, 75, 1, 7, 2, 5, 45, 65, 1, 1, 1, 1, 31, 107, 107, 33, 1, 2, 2, 1, 77, 57, 1, 1, 73, 122, 122, 39, 3, 3, 9, 1, 89, 105, 3, 1, 43 (list; graph; listen)

	OFFSET	`1,3`
	FORMULA	`a(n)=GCD[sigma(n+1)-(n+1)-1, sigma(n)-n-1]`
	EXAMPLE	`Chowla-function values from 92 to 96 are 75,34,49,24,155: successive values are relatively primes.`
	CROSSREFS	`Cf. A048050, A000203, A001650.` `Adjacent sequences: A069893 A069894 A069895 this_sequence A069897 A069898 A069899` `Sequence in context: A008280 A063960 A025510 this_sequence A053246 A035624 A073707`
	KEYWORD	`easy,nonn`
	AUTHOR	`Labos E. (labos(AT)ana.sote.hu), Apr 10 2002`

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Last modified October 13 20:18 EDT 2008. Contains 145016 sequences.

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