A054230 Number of positive integers <= 2^n of form x^2 + 17 y^2.

1, 1, 2, 2, 4, 9, 15, 28, 53, 100, 184, 342, 656, 1243, 2381, 4579, 8827, 17073, 33108, 64330, 125224, 244171, 476748, 932093, 1824397, 3574605, 7010170, 13759682, 27027854, 53128077, 104499533, 205667340, 405000500, 797940280, 1572873981

Offset

0,3

Links

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

Crossrefs

Sequence in context: A175390 A054233 A054231 * A054232 A100048 A052935

Adjacent sequences: A054227 A054228 A054229 * A054231 A054232 A054233

Keyword

nonn

Author

David W. Wilson

Status

approved