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Search: id:A000709
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| A000709 |
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Related to population of numbers of form x^2 + y^2.
(Formerly M1060 N0398)
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+0
1
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| 1, 2, 4, 7, 12, 21, 38, 68, 124, 229, 428, 806, 1530, 2919, 5591, 10750, 20717, 40077, 77653, 150752, 293161, 570963, 1113524, 2174315, 4250367, 8317036
(list; graph; listen)
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OFFSET
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1,2
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REFERENCES
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N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).
D. Shanks, The second-order term in the asymptotic expansion of B(x), Math. Comp., 18 (1964), 75-86.
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LINKS
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Index entries for sequences related to populations of quadratic forms
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CROSSREFS
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Sequence in context: A005251 A014167 A103197 this_sequence A054161 A023433 A005126
Adjacent sequences: A000706 A000707 A000708 this_sequence A000710 A000711 A000712
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KEYWORD
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nonn
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com).
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