A054191 Number of positive integers <= 2^n of form 8 x^2 + 9 y^2.

0, 0, 0, 1, 2, 4, 7, 14, 26, 48, 92, 168, 320, 605, 1157, 2205, 4235, 8141, 15730, 30427, 59003, 114611, 223037, 434661, 848194, 1657194, 3241128, 6345672, 12434563, 24386363, 47862135, 94003161, 184745311, 363303064, 714836493, 1407256329

Offset

0,5

Links

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

Index entries for sequences related to populations of quadratic forms

Crossrefs

Cf. A020693.

Sequence in context: A347780 A351013 A097596 * A347761 A257792 A079975

Adjacent sequences: A054188 A054189 A054190 * A054192 A054193 A054194

Keyword

nonn

Author

David W. Wilson

Status

approved