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A054188
Number of positive integers <= 2^n of form 7 x^2 + 9 y^2.
0
0, 0, 0, 1, 3, 4, 9, 16, 30, 54, 102, 190, 360, 688, 1313, 2535, 4889, 9464, 18376, 35741, 69623, 135899, 265500, 519498, 1017399, 1994552, 3913769, 7685870, 15104369, 29704016, 58451497, 115087453, 226721774, 446861878, 881163356
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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.
A020691
.
Sequence in context:
A367083
A375966
A271785
*
A093368
A278025
A095095
Adjacent sequences:
A054185
A054186
A054187
*
A054189
A054190
A054191
KEYWORD
nonn
AUTHOR
David W. Wilson
STATUS
approved
