A054177 Number of positive integers <= 2^n of form 5 x^2 + 7 y^2.

0, 0, 0, 2, 3, 6, 11, 20, 37, 69, 128, 241, 458, 869, 1666, 3202, 6183, 11966, 23227, 45149, 87983, 171703, 335520, 656541, 1286071, 2521752, 4949262, 9721510, 19109550, 37589316, 73985978, 145708602, 287115841, 566037092, 1116437422

Offset

0,4

Links

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

Index entries for sequences related to populations of quadratic forms

Crossrefs

Cf. A020686.

Sequence in context: A078042 A047081 A115792 * A186546 A318910 A141435

Adjacent sequences: A054174 A054175 A054176 * A054178 A054179 A054180

Keyword

nonn

Author

David W. Wilson

Status

approved