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A000018 Number of positive integers <= 2^n of form x^2 + 16y^2.
(Formerly M0331 N0126)
+0
1
1, 1, 2, 2, 4, 8, 13, 25, 44, 83, 152, 286, 538, 1020, 1942, 3725, 7145, 13781, 26627, 51572, 100099, 194633, 379037, 739250, 1443573, 2822186, 5522889, 10818417, 21209278, 41613288, 81705516, 160532194, 315604479, 620834222, 1221918604, 2406183020, 4740461247 (list; graph; listen)
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Last modified December 1 19:22 EST 2009. Contains 167811 sequences.


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