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A054229 Number of positive integers <= 2^n of form x^2 + 15 y^2. +0
1
1, 1, 2, 2, 5, 9, 16, 27, 52, 91, 173, 322, 606, 1152, 2191, 4191, 8060, 15540, 30018, 58161, 112891, 219479, 427440, 833615, 1627752, 3182068, 6226916, 12196740, 23910690, 46911434, 92104753, 180957883, 355748937, 699779680, 1377255678 (list; graph; listen)
OFFSET

0,3

CROSSREFS

Sequence in context: A131133 A096569 A076607 this_sequence A052969 A002990 A060405

Adjacent sequences: A054226 A054227 A054228 this_sequence A054230 A054231 A054232

KEYWORD

nonn

AUTHOR

David W. Wilson (davidwwilson(AT)comcast.net)

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Last modified December 20 16:54 EST 2009. Contains 171081 sequences.


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