id:A050471 - OEIS Search Results

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Sum_{d|n, n/d=1 mod 4} d^3 - Sum_{d|n, n/d=3 mod 4} d^3.

+0
4

1, 8, 26, 64, 126, 208, 342, 512, 703, 1008, 1330, 1664, 2198, 2736, 3276, 4096, 4914, 5624, 6858, 8064, 8892, 10640, 12166, 13312, 15751, 17584, 18980, 21888, 24390, 26208, 29790, 32768, 34580, 39312, 43092, 44992, 50654, 54864, 57148 (list; graph; listen)

	OFFSET	`0,2`
	COMMENT	`Multiplicative because it is the Dirichlet convolution of A000578 = n^3 and A101455 = [1 0 -1 0 1 0 -1 ...], which are both multiplicative. Christian G. Bower (bowerc(AT)usa.net) May 17, 2005.`
	FORMULA	`G.f.: Sum_{n>=1} n^3x^n/(1+x^(2n)). - Vladeta Jovovic (vladeta(AT)Eunet.yu), Oct 16 2002`
	CROSSREFS	`Cf. A050469, A050470, A050468.` `Sequence in context: A129111 A002413 A002901 this_sequence A088024 A051669 A027004` `Adjacent sequences: A050468 A050469 A050470 this_sequence A050472 A050473 A050474`
	KEYWORD	`nonn,mult`
	AUTHOR	`njas, Dec 23 1999`

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Last modified September 6 16:04 EDT 2008. Contains 143483 sequences.

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