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Search: id:A084848
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| A084848 |
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Number of quadratic residues of the numbers n with least quadratic residues density up to n (A085635). |
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+0
2
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| 2, 2, 2, 3, 4, 4, 7, 8, 12, 14, 16, 16, 24, 28, 32, 42, 48, 48, 48, 64, 84, 96, 112, 144, 144, 176, 192, 192, 288, 336, 336, 504, 576, 576, 704, 864, 1008, 1056, 1152, 1232, 1152, 1344, 1728, 1920, 2016, 2016, 2352
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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After a(25), there is another number with exactly the same density (the number 3360), with 168 quadratic residues, so the term may has to been thought as a(25)=144/168
Note that some terms occur more than once.
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EXAMPLE
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a(2)=2 because there are 2 different quadratic residues modulo 3, so 3 has 66,67% of quadratic residues density, while 2 has a 100%, so 3 has the least quadratic residues density up to 3
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CROSSREFS
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Cf. A085635.
Sequence in context: A005863 A015740 A015750 this_sequence A144732 A055224 A126295
Adjacent sequences: A084845 A084846 A084847 this_sequence A084849 A084850 A084851
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KEYWORD
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nonn
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AUTHOR
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Jose R. Brox (tautocrona(AT)terra.es), Jul 12 2003
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EXTENSIONS
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More terms from Jud McCranie (j.mccranie(AT)comcast.net), Jul 18 2003
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