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A054169 Number of positive integers <= 2^n of form 4 x^2 + 5 y^2. +0
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0, 0, 1, 2, 4, 7, 14, 25, 45, 84, 154, 290, 549, 1043, 1990, 3820, 7352, 14198, 27473, 53327, 103697, 201926, 393781, 769123, 1503776, 2943595, 5767727, 11310982, 22200249, 43604981, 85706123, 168562900, 331717805, 653148282, 1286697640 (list; graph; listen)
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Last modified December 20 00:58 EST 2009. Contains 171054 sequences.


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