A054179 Number of positive integers <= 2^n of form 5 x^2 + 9 y^2.

0, 0, 0, 1, 3, 5, 10, 18, 32, 60, 110, 207, 391, 739, 1411, 2695, 5158, 9941, 19187, 37151, 72038, 140000, 272470, 531133, 1036727, 2025812, 3962913, 7759632, 15207510, 29828260, 58549403, 115004444, 226040861, 444547031, 874762315

Offset

0,5

Links

Table of n, a(n) for n=0..34.

Index entries for sequences related to populations of quadratic forms

Crossrefs

Cf. A020688.

Sequence in context: A298116 A357534 A018165 * A010049 A356507 A094986

Adjacent sequences: A054176 A054177 A054178 * A054180 A054181 A054182

Keyword

nonn

Author

David W. Wilson

Status

approved