id:A054151 - OEIS Search Results

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Number of positive integers <= 2^n of form x^2 + 7 y^2.

+0
1

1, 1, 2, 4, 7, 12, 21, 39, 69, 130, 240, 451, 854, 1620, 3101, 5941, 11443, 22080, 42724, 82835, 160914, 313149, 610230, 1190802, 2326448, 4550161, 8908095, 17455391, 34232368, 67184426, 131949378, 259313689, 509925468, 1003302084 (list; graph; listen)

	OFFSET	`0,3`
	LINKS	`Index entries for sequences related to populations of quadratic forms`
	CROSSREFS	`Sequence in context: A054161 A023433 A005126 this_sequence A018176 A135460 A089259` `Adjacent sequences: A054148 A054149 A054150 this_sequence A054152 A054153 A054154`
	KEYWORD	`nonn`
	AUTHOR	`David W. Wilson (davidwwilson(AT)comcast.net)`

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Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.

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