id:A033684 - OEIS Search Results

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1 iff n is a square not divisible by 3.

+0
1

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

	OFFSET	`0,1`
	COMMENT	`Multiplicative with a(p^e) = 1 if 2 divides e and p != 3, 0 otherwise. Mitch Harris (Harris.Mitchell(AT)mgh.harvard.edu) Jun 09, 2005.`
	REFERENCES	`J. H. Conway and N. J. A. Sloane, Sphere Packings, Lattices and Groups, Springer-Verlag, p. 105, Eq (40).`
	FORMULA	`Essentially the series psi_3(z)=(1/2)(theta_3(z/9)-theta_3(z)).`
	CROSSREFS	`Sequence in context: A091444 A091447 A106701 this_sequence A080885 A068716 A129185` `Adjacent sequences: A033681 A033682 A033683 this_sequence A033685 A033686 A033687`
	KEYWORD	`nonn,mult`
	AUTHOR	`njas`

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Last modified September 8 08:06 EDT 2008. Contains 143486 sequences.

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