id:A034761 - OEIS Search Results

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Dirichlet convolution of sigma(n) with itself.

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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; listen)

	OFFSET	`1,2`
	LINKS	`T. D. Noe, Table of n, a(n) for n=1..10000`
	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`
	CROSSREFS	`Cf. A134577, A000005.` `Sequence in context: A084962 A024306 A024868 this_sequence A085796 A005887 A119875` `Adjacent sequences: A034758 A034759 A034760 this_sequence A034762 A034763 A034764`
	KEYWORD	`nonn,mult`
	AUTHOR	`Erich Friedman (erich.friedman(AT)stetson.edu)`

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Last modified December 6 22:55 EST 2009. Contains 170429 sequences.

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