id:A054150 - OEIS Search Results

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

+0
1

1, 1, 2, 4, 7, 13, 22, 40, 73, 132, 245, 458, 864, 1638, 3123, 5979, 11484, 22140, 42773, 82865, 160809, 312659, 608857, 1187323, 2318344, 4531879, 8867913, 17369053, 34048772, 66799240, 131146379, 257651913, 506503984, 996288321 (list; graph; listen)

	OFFSET	`0,3`
	LINKS	`Index entries for sequences related to populations of quadratic forms`
	CROSSREFS	`Sequence in context: A101268 A128768 A001036 this_sequence A130709 A073832 A051013` `Adjacent sequences: A054147 A054148 A054149 this_sequence A054151 A054152 A054153`
	KEYWORD	`nonn`
	AUTHOR	`David W. Wilson (davidwwilson(AT)comcast.net)`

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Last modified December 3 16:57 EST 2008. Contains 151279 sequences.

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