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A054186 Number of positive integers <= 2^n of form 7 x^2 + 7 y^2. 0
0, 0, 0, 1, 2, 3, 6, 11, 18, 33, 60, 110, 204, 381, 717, 1355, 2582, 4939, 9485, 18264, 35273, 68275, 132440, 257385, 500985, 976621, 1906221, 3725007, 7286865, 14268275, 27963114, 54846674, 107656257, 211459271, 415616221, 817365314 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,5

LINKS

Table of n, a(n) for n=0..35.

Index entries for sequences related to populations of quadratic forms

CROSSREFS

Sequence in context: A291725 A003479 A093367 * A032156 A146385 A039827

Adjacent sequences:  A054183 A054184 A054185 * A054187 A054188 A054189

KEYWORD

nonn

AUTHOR

David W. Wilson

STATUS

approved

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Last modified May 26 13:05 EDT 2019. Contains 323586 sequences. (Running on oeis4.)