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A114003
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Rows sums of triangle A114002.
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3
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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, 11, 3, 15, 7, 15, 7, 7, 3, 23, 3, 7, 11, 13, 7, 15, 3, 11, 7, 15, 3, 23, 3, 7, 11, 11, 7, 15, 3, 19, 9, 7, 3, 23, 7, 7, 7, 15, 3, 23, 7, 11, 7, 7, 7, 23, 3
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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COMMENTS
| a(p)=3.
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FORMULA
| 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*(1+x^n)/(1-x^n). [From Franklin T. Adams-Watters (FrankTAW(AT)Netscape.net), Oct 09 2009]
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PROG
| (Pari) N=66; x='x+O('x^N); /* that many terms */
Vec(sum(n=1, N, x^n*(1+x^n)/(1-x^n))) /* show terms */ /* Joerg Arndt, May 25 2011 */
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CROSSREFS
| Also row sums of triangle A144515. - Gary W. Adamson (qntmpkt(AT)yahoo.com), Nov 21 2007
Cf. A051731.
Sequence in context: A015971 A163167 A200810 * A029622 A015126 A096866
Adjacent sequences: A114000 A114001 A114002 * A114004 A114005 A114006
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KEYWORD
| nonn,more
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AUTHOR
| Paul Barry (pbarry(AT)wit.ie), Nov 12 2005
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