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A034761
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Dirichlet convolution of sigma(n) with itself.
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3
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1, 6, 8, 23, 12, 48, 16, 72, 42, 72, 24, 184, 28, 96, 96, 201, 36, 252, 40, 276, 128, 144, 48, 576, 98, 168, 184, 368, 60, 576, 64, 522, 192, 216, 192, 966, 76, 240, 224, 864, 84, 768, 88, 552, 504, 288, 96, 1608, 178, 588, 288, 644, 108, 1104, 288, 1152, 320, 360
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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LINKS
| T. D. Noe, Table of n, a(n) for n=1..10000
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FORMULA
| Dirichlet g.f.: zeta^2(x)zeta^2(x-1)
Multiplicative with a(2^e) = (n-1) 2^(n+2) + n + 5, a(p^e) = ((1+e)p^(e+3) - (3+e)(p^(e+2)-p-1) + 2)/2, p > 2. Mitch Harris (Harris.Mitchell(AT)mgh.harvard.edu) Jun 27, 2005.
Equals A134577 * A000005 - Gary W. Adamson (qntmpkt(AT)yahoo.com), Nov 02 2007
Also the Dirichlet convolution A000005 by A038040. - R. J. Mathar, Apr 01 2011
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CROSSREFS
| Cf. A134577, A000005.
Sequence in context: A084962 A024306 A024868 * A085796 A005887 A119875
Adjacent sequences: A034758 A034759 A034760 * A034762 A034763 A034764
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KEYWORD
| nonn,mult
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AUTHOR
| Erich Friedman (erich.friedman(AT)stetson.edu)
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