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A054164 Number of positive integers <= 2^n of form 3 x^2 + 7 y^2. 0
0, 0, 1, 2, 4, 8, 13, 24, 44, 79, 147, 275, 516, 976, 1859, 3552, 6810, 13102, 25281, 48908, 94819, 184144, 358279, 698183, 1362298, 2661409, 5204770, 10189097, 19964562, 39151220, 76835090, 150897513, 296542636, 583115721, 1147276480 (list; graph; refs; listen; history; internal format)
OFFSET

0,4

LINKS

Index entries for sequences related to populations of quadratic forms

CROSSREFS

Sequence in context: A018066 A096573 A000077 * A102704 A196720 A043774

Adjacent sequences:  A054161 A054162 A054163 * A054165 A054166 A054167

KEYWORD

nonn

AUTHOR

David W. Wilson (davidwwilson(AT)comcast.net)

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Last modified February 17 00:09 EST 2012. Contains 205978 sequences.