id:A054014 - OEIS Search Results

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Chowla function of n read modulo (the number of divisors of n).

+0
5

0, 0, 0, 2, 0, 1, 0, 2, 0, 3, 0, 3, 0, 1, 0, 4, 0, 2, 0, 3, 2, 1, 0, 3, 2, 3, 0, 3, 0, 1, 0, 0, 2, 3, 0, 0, 0, 1, 0, 1, 0, 5, 0, 3, 2, 1, 0, 5, 1, 0, 0, 3, 0, 1, 0, 7, 2, 3, 0, 11, 0, 1, 4, 6, 2, 5, 0, 3, 2, 1, 0, 2, 0, 3, 0, 3, 2, 1, 0, 5, 4, 3, 0, 7, 2, 1, 0, 3, 0, 11, 0, 3, 2, 1, 0, 11, 0, 0, 2, 8, 0, 1, 0 (list; graph; listen)

	OFFSET	`1,4`
	COMMENT	`Chowla's function (A048050) = sum of divisors of n except 1 and n.`
	FORMULA	`a(n) = A048050(n) mod A000005.`
	MAPLE	`with(numtheory): [seq((sigma(i)-i-1) mod tau(i), i=1..120)];`
	CROSSREFS	`Cf. A000005, A048050, A054013, A054015.` `Sequence in context: A070090 A053473 A084929 this_sequence A110914 A127505 A138036` `Adjacent sequences: A054011 A054012 A054013 this_sequence A054015 A054016 A054017`
	KEYWORD	`nonn`
	AUTHOR	`Asher Auel (asher.auel(AT)reed.edu) Jan 17, 2000`

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

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