id:A000690 - OEIS Search Results

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Landau's approximation to population of x^2 + y^2.
(Formerly M0586 N0212)

+0
1

1, 2, 3, 4, 7, 13, 24, 44, 83, 157, 297, 567, 1085, 2086, 4019, 7766, 15039, 29181, 56717, 110408, 215225, 420076, 820836, 1605587, 3143562, 6160098, 12080946 (list; graph; listen)

	OFFSET	`0,2`
	REFERENCES	`D. Shanks, The second-order term in the asymptotic expansion of B(x), Math. Comp., 18 (1964), 75-86.`
	LINKS	`Index entries for sequences related to populations of quadratic forms`
	CROSSREFS	`Sequence in context: A096723 A137495 A099779 this_sequence A049876 A049795 A014251` `Adjacent sequences: A000687 A000688 A000689 this_sequence A000691 A000692 A000693`
	KEYWORD	`nonn`
	AUTHOR	`njas`

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Last modified September 6 16:04 EDT 2008. Contains 143483 sequences.

AT&T Labs Research