A054189 Number of positive integers <= 2^n of form 7 x^2 + 10 y^2.

0, 0, 0, 1, 2, 4, 8, 16, 28, 56, 104, 197, 369, 699, 1331, 2540, 4870, 9354, 18066, 34949, 67788, 131656, 256271, 499498, 974856, 1904908, 3726067, 7295536, 14297372, 28041681, 55040986, 108110861, 212487489, 417884442, 822287416

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. A020692.

Sequence in context: A355969 A308542 A326116 * A127195 A255937 A357763

Adjacent sequences: A054186 A054187 A054188 * A054190 A054191 A054192

Keyword

nonn

Author

David W. Wilson

Status

approved