A054175 Number of positive integers <= 2^n of form 5 x^2 + 5 y^2.

0, 0, 0, 1, 2, 4, 7, 13, 24, 44, 80, 149, 276, 517, 975, 1852, 3537, 6775, 13027, 25128, 48589, 94151, 182809, 355553, 692591, 1350973, 2638450, 5158567, 10096032, 19777579, 38775771, 76082812, 149390879, 293528094, 577088731, 1135234401

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: A107281 A384175 A006744 * A305442 A000073 A255069

Adjacent sequences: A054172 A054173 A054174 * A054176 A054177 A054178

Keyword

nonn

Author

David W. Wilson

Status

approved