id:A054171 - OEIS Search Results

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Number of positive integers <= 2^n of form 4 x^2 + 7 y^2.

+0
1

0, 0, 1, 2, 4, 7, 12, 23, 41, 77, 142, 270, 504, 958, 1834, 3505, 6752, 13016, 25170, 48775, 94718, 184210, 358805, 699919, 1366853, 2672452, 5230345, 10245791, 20088113, 39415538, 77394348, 152067981, 298975703, 588143637, 1157617442 (list; graph; listen)

	OFFSET	`0,4`
	LINKS	`Index entries for sequences related to populations of quadratic forms`
	CROSSREFS	`Sequence in context: A099604 A026790 A054165 this_sequence A018080 A018181 A141017` `Adjacent sequences: A054168 A054169 A054170 this_sequence A054172 A054173 A054174`
	KEYWORD	`nonn`
	AUTHOR	`David W. Wilson (davidwwilson(AT)comcast.net)`

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Last modified November 24 23:16 EST 2009. Contains 167481 sequences.

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