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1, 3, 4, 5, 5, 7, 6, 8, 7, 8, 7, 11, 8, 10, 10, 11, 9, 13, 10, 14, 12, 12, 11, 17, 12, 13, 13, 15, 12, 18, 13, 17, 15, 15, 15, 20, 14, 16, 16, 20, 15, 21, 16, 20, 20, 18, 17, 25, 18, 21, 19, 21, 18, 24, 20, 24, 20, 20, 19, 29, 20, 22, 24, 25, 22, 26, 21, 25, 23, 27, 22, 32, 23, 25
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,2
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LINKS
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FORMULA
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MATHEMATICA
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Table[DivisorSigma[0, w]+PrimePi[w], {w, 1, 128}]
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PROG
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(PARI) a(n) = primepi(n) + numdiv(n); \\ Michel Marcus, Dec 01 2021
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CROSSREFS
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KEYWORD
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easy,nonn,less
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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