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A106621
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Numerator of n/(n+20).
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3
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0, 1, 1, 3, 1, 1, 3, 7, 2, 9, 1, 11, 3, 13, 7, 3, 4, 17, 9, 19, 1, 21, 11, 23, 6, 5, 13, 27, 7, 29, 3, 31, 8, 33, 17, 7, 9, 37, 19, 39, 2, 41, 21, 43, 11, 9, 23, 47, 12, 49, 5, 51, 13, 53, 27, 11, 14, 57, 29, 59, 3, 61, 31, 63, 16, 13, 33, 67, 17, 69, 7, 71, 18, 73, 37, 15, 19, 77, 39, 79
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,4
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MATHEMATICA
| f[n_]:=Numerator[n/(n+20)]; Array[f, 100, 0] (*From Vladimir Joseph Stephan Orlovsky, Feb 17 2011*)
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PROG
| (Other) sage: [lcm(20, n)/20for n in xrange(0, 80)] # [From Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Jun 12 2009]
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CROSSREFS
| Sequence in context: A140211 A097706 A132740 * A011085 A199922 A112508
Adjacent sequences: A106618 A106619 A106620 * A106622 A106623 A106624
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KEYWORD
| nonn,frac
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com), May 15 2005
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