id:A096397 - OEIS Search Results

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a(n) = #{ 1<=i<=n : k(n,i)=-1 } where k(n,i) is the Kronecker symbol.

+0
1

0, 0, 1, 0, 2, 0, 1, 2, 0, 1, 4, 2, 6, 1, 1, 0, 8, 3, 8, 4, 6, 4, 8, 4, 0, 3, 9, 6, 14, 2, 9, 8, 10, 6, 10, 0, 18, 6, 6, 8, 20, 4, 21, 10, 12, 9, 18, 8, 0, 9, 14, 12, 26, 8, 11, 12, 18, 13, 26, 8, 30, 11, 17, 0, 24, 6, 34, 16, 22, 10, 28, 12, 36, 13, 18, 18, 30, 10, 28, 16, 0, 18, 39, 12, 32 (list; graph; listen)

	OFFSET	`1,5`
	PROGRAM	`(PARI) a(n)=sum(i=1, n, if(kronecker(n, i)+1, 0, 1))`
	CROSSREFS	`Cf. A000010, A051953.` `Sequence in context: A141100 A058685 A029300 this_sequence A103919 A035445 A053603` `Adjacent sequences: A096394 A096395 A096396 this_sequence A096398 A096399 A096400`
	KEYWORD	`nonn`
	AUTHOR	`Benoit Cloitre (benoit7848c(AT)orange.fr), Aug 06 2004`

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Last modified December 4 23:11 EST 2009. Contains 170347 sequences.

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