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A103591
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Smallest number m such that Sum_{k=1..m} 1/prime(k) >= n/2.
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10
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OFFSET
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1,2
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LINKS
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Table of n, a(n) for n=1..8.
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FORMULA
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a(2n) = A046024(n). - Michel Marcus, Aug 22 2013
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MATHEMATICA
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Table[m = 1; s = 0; While[(s = s + 1/Prime[m]) < n/2, m++];
m, {n, 1, 5}] (* Robert Price, Mar 27 2019 *)
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PROG
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(PARI) a(n) = my(s = 0, k = 1); while ((s += 1/prime(k)) < n/2, k++); k \\ Michel Marcus, Aug 22 2013
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CROSSREFS
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Cf. A016088, A046024, A103592-A103600.
Sequence in context: A159321 A181077 A158873 * A245312 A018932 A111562
Adjacent sequences: A103588 A103589 A103590 * A103592 A103593 A103594
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KEYWORD
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nonn,more
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AUTHOR
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James R. Buddenhagen, Mar 28 2005
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EXTENSIONS
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a(7) from Robert Price, Dec 10 2013
a(8) derived from A046024 by Robert Price, Dec 10 2013
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STATUS
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approved
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