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Search: id:A114003
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| 1, 3, 3, 5, 3, 7, 3, 7, 5, 7, 3, 11, 3, 7, 7, 9, 3, 11, 3, 11, 7, 7, 3, 15, 5, 7, 7, 11, 3, 15, 3, 11, 7, 7, 7, 17, 3, 7, 7, 15, 3, 15, 3, 11, 11, 7, 3, 19, 5, 11, 7
(list; graph; listen)
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OFFSET
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1,2
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COMMENT
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a(p)=3.
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FORMULA
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a(n) = 2*A000005(n)-1. - Vladeta Jovovic (vladeta(AT)eunet.rs), Sep 13 2006
Equals A051731 * [1, 2, 2, 2,...]. - Gary W. Adamson (qntmpkt(AT)yahoo.com), Sep 21 2007
G.f.: Sum_{n>0} (x^n+x^(2n))/(1-x^n). [From Franklin T. Adams-Watters (FrankTAW(AT)Netscape.net), Oct 09 2009]
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CROSSREFS
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Also row sums of triangle A144515. - Gary W. Adamson (qntmpkt(AT)yahoo.com), Nov 21 2007
Cf. A051731.
Sequence in context: A057662 A015971 A163167 this_sequence A029622 A015126 A096866
Adjacent sequences: A114000 A114001 A114002 this_sequence A114004 A114005 A114006
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KEYWORD
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nonn,more
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AUTHOR
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Paul Barry (pbarry(AT)wit.ie), Nov 12 2005
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