References to A000049

Number of positive integers <= 2^n of form 3 x^2 + 4 y^2.
0, 0, 2, 3, 5, 9, 16, 29, 53, 98, 181, 341, 640, 1218, 2321, 4449, 8546, 16482, 31845

2 seqfan posts

Fri Oct 29 05:35:16 CEST 2010    [seqfan] Implementing first 500 sequences in Java
Mon Jan 19 18:40:38 CET 2009    [seqfan] How to generate A000047?
Index of A-numbers in seqfan: by ascending order    by month    by frequency    by keyword
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