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A054227 Number of positive integers <= 2^n of form x^2 + 13 y^2. +0
1
1, 1, 2, 2, 6, 10, 19, 32, 58, 105, 194, 364, 682, 1295, 2467, 4723, 9059, 17448, 33706, 65256, 126643, 246179, 479336, 934603, 1824646, 3566467, 6978040, 13666391, 26788334, 52551600, 103168475, 202676349, 398411711, 783639902, 1542192977 (list; graph; listen)
OFFSET

0,3

CROSSREFS

Sequence in context: A077017 A127404 A165941 this_sequence A054228 A044044 A123757

Adjacent sequences: A054224 A054225 A054226 this_sequence A054228 A054229 A054230

KEYWORD

nonn

AUTHOR

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

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.


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