id:A000049 - OEIS Search Results

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Number of positive integers <= 2^n of form 3 x^2 + 4 y^2.
(Formerly M0714 N0264)

+0
2

0, 0, 2, 3, 5, 9, 16, 29, 53, 98, 181, 341, 640, 1218, 2321, 4449, 8546, 16482, 31845, 61707, 119760, 232865, 453511, 884493, 1727125, 3376376, 6607207, 12941838, 25371086, 49776945, 97730393, 192009517, 377473965, 742511438, 1461351029, 2877568839, 5668961811 (list; graph; listen)

	OFFSET	`0,3`
	REFERENCES	`D. Shanks and L. P. Schmid, Variations on a theorem of Landau. Part I, Math. Comp., 20 (1966), 551-569.`
	LINKS	`Index entries for sequences related to populations of quadratic forms`
	CROSSREFS	`Adjacent sequences: A000046 A000047 A000048 this_sequence A000050 A000051 A000052` `Sequence in context: A022857 A000691 A103285 this_sequence A000050 A050253 A107250`
	KEYWORD	`nonn`
	AUTHOR	`njas`

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Last modified October 11 13:47 EDT 2008. Contains 144830 sequences.

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