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A028744
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Nonsquares mod 31.
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1
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3, 6, 11, 12, 13, 15, 17, 21, 22, 23, 24, 26, 27, 29, 30
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,1
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LINKS
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MATHEMATICA
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Complement[Range[0, 30], PowerMod[Range[31], 2, 31]] (* Alonso del Arte, Dec 31 2019 *)
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PROG
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(Scala) (0 to 30).diff((1 to 31).map(n => n * n % 31)) // Alonso del Arte, Dec 31 2019
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CROSSREFS
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KEYWORD
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nonn,fini,full,easy
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AUTHOR
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STATUS
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approved
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