id:A096396 - OEIS Search Results

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

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1, 1, 1, 2, 2, 2, 5, 2, 6, 3, 6, 2, 6, 5, 7, 8, 8, 3, 10, 4, 6, 6, 14, 4, 20, 9, 9, 6, 14, 6, 21, 8, 10, 10, 14, 12, 18, 12, 18, 8, 20, 8, 21, 10, 12, 13, 28, 8, 42, 11, 18, 12, 26, 10, 29, 12, 18, 15, 32, 8, 30, 19, 19, 32, 24, 14, 32, 16, 22, 14, 42, 12, 36, 23, 22, 18, 30, 14, 50, 16 (list; graph; listen)

	OFFSET	`1,4`
	PROGRAM	`(PARI) a(n)=sum(i=1, n, if(kronecker(n, i)-1, 0, 1))`
	CROSSREFS	`Cf. A000010, A051953.` `Sequence in context: A095370 A046053 A080348 this_sequence A029662 A077913 A069862` `Adjacent sequences: A096393 A096394 A096395 this_sequence A096397 A096398 A096399`
	KEYWORD	`nonn`
	AUTHOR	`Benoit Cloitre (benoit7848c(AT)orange.fr), Aug 06 2004`

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Last modified July 25 07:41 EDT 2008. Contains 142293 sequences.

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