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Search: id:A062731
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| 3, 7, 12, 15, 18, 28, 24, 31, 39, 42, 36, 60, 42, 56, 72, 63, 54, 91, 60, 90, 96, 84, 72, 124, 93, 98, 120, 120, 90, 168, 96, 127, 144, 126, 144, 195, 114, 140, 168, 186, 126, 224, 132, 180, 234, 168, 144, 252, 171, 217, 216, 210, 162, 280, 216, 248, 240, 210
(list; graph; listen)
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OFFSET
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1,1
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LINKS
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Harry J. Smith, Table of n, a(n) for n=1,...,1000
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MATHEMATICA
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lst={}; Do[AppendTo[lst, DivisorSigma[1, n]], {n, 2, 6!, 2}]; lst [From Vladimir Orlovsky (4vladimir(AT)gmail.com), Sep 20 2008]
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PROGRAM
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(PARI) je=[]; forstep(n=0, 450, 2, je=concat(je, sumdiv(n, d, d))); je
(MuPad) numlib::sigma(2*n)$ n=0..81 - Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), May 13 2008
(PARI) { for (n=1, 1000, write("b062731.txt", n, " ", sigma(2*n)) ) } [From Harry J. Smith (hjsmithh(AT)sbcglobal.net), Aug 09 2009]
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CROSSREFS
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Cf. A008438.
Sequence in context: A045134 A081695 A142958 this_sequence A083031 A022805 A107790
Adjacent sequences: A062728 A062729 A062730 this_sequence A062732 A062733 A062734
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KEYWORD
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easy,nonn
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AUTHOR
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Jason Earls (zevi_35711(AT)yahoo.com), Jul 11 2001
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EXTENSIONS
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Zero removed and offset corrected by Omar E. Pol (info(AT)polprimos.com), Jul 17 2009
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