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Coefficients in expansion of Dirichlet series Product_p (1-(Kronecker(m,p)+1)*p^(-s)+Kronecker(m,p)*p^(-2s))^(-1) for m = 20.

+0
1

1, 1, 0, 1, 1, 0, 0, 1, 1, 1, 2, 0, 0, 0, 0, 1, 0, 1, 2, 1, 0, 2, 0, 0, 1, 0, 0, 0, 2, 0, 2, 1, 0, 0, 0, 1, 0, 2, 0, 1, 2, 0, 0, 2, 1, 0, 0, 0, 1, 1, 0, 0, 0, 0, 2, 0, 0, 2, 2, 0, 2, 2, 0, 1, 0, 0, 0, 0, 0, 0, 2, 1, 0, 0, 0, 2, 0, 0, 2, 1, 1, 2, 0, 0, 0, 0, 0, 2, 2, 1, 0, 0, 0, 0, 2, 0, 0, 1, 2, 1, 2, 0, 0, 0, 0 (list; graph; listen)

	OFFSET	`1,11`
	COMMENT	`Also number of divisors of n which end in 1 or 9 minus number of divisors of n which end in 3 or 7. E.g. a(98)=2-1=1 since divisors of 98 are: 1 and 49 counting +1 each; 2, 14 and 98 counting 0 each; and 7 counting -1. - Henry Bottomley (se16(AT)btinternet.com), Jul 08 2003`
	LINKS	`MathNerds, An Excess of Divisors.`
	PROGRAM	`(PARI) direuler(p=2, 101, 1/(1-(kronecker(m, p)*(X-X^2))-X))`
	CROSSREFS	`Sequence in context: A033770 A101668 A141846 this_sequence A128616 A101257 A144629` `Adjacent sequences: A035199 A035200 A035201 this_sequence A035203 A035204 A035205`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com).`
	EXTENSIONS	`More terms from Henry Bottomley (se16(AT)btinternet.com), Jul 08 2003`

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Last modified November 29 12:46 EST 2009. Contains 167659 sequences.

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