id:A054157 - OEIS Search Results

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

+0
1

0, 1, 1, 3, 5, 10, 17, 33, 58, 109, 202, 379, 720, 1369, 2618, 5031, 9701, 18766, 36387, 70688, 137572, 268208, 523581, 1023425, 2002829, 3923400, 7692930, 15096706, 29649082, 58270386, 114596178, 225503077, 443996993, 874648723, 1723849033 (list; graph; listen)

	OFFSET	`0,4`
	LINKS	`Index entries for sequences related to populations of quadratic forms`
	CROSSREFS	`Sequence in context: A018072 A090170 A054166 this_sequence A026621 A096395 A026687` `Adjacent sequences: A054154 A054155 A054156 this_sequence A054158 A054159 A054160`
	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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