id:A054169 - OEIS Search Results

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Number of positive integers <= 2^n of form 4 x^2 + 5 y^2.

+0
1

0, 0, 1, 2, 4, 7, 14, 25, 45, 84, 154, 290, 549, 1043, 1990, 3820, 7352, 14198, 27473, 53327, 103697, 201926, 393781, 769123, 1503776, 2943595, 5767727, 11310982, 22200249, 43604981, 85706123, 168562900, 331717805, 653148282, 1286697640 (list; graph; listen)

	OFFSET	`0,4`
	LINKS	`Index entries for sequences related to populations of quadratic forms`
	CROSSREFS	`Sequence in context: A048248 A056180 A000076 this_sequence A065491 A072810 A167606` `Adjacent sequences: A054166 A054167 A054168 this_sequence A054170 A054171 A054172`
	KEYWORD	`nonn`
	AUTHOR	`David W. Wilson (davidwwilson(AT)comcast.net)`

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Last modified December 15 00:47 EST 2009. Contains 170825 sequences.

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