id:A086156 - OEIS Search Results

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a(n)=sigma[n*n]-n*sigma[n].

+0
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0, 1, 1, 3, 1, 19, 1, 7, 4, 37, 1, 67, 1, 63, 43, 15, 1, 145, 1, 121, 69, 139, 1, 211, 6, 189, 13, 199, 1, 661, 1, 31, 145, 313, 87, 475, 1, 387, 195, 337, 1, 1155, 1, 427, 241, 559, 1, 691, 8, 817, 319, 577, 1, 1171, 163, 519, 393, 877, 1, 2413, 1, 999, 345, 63, 213, 2599 (list; graph; listen)

	OFFSET	`1,4`
	MATHEMATICA	`Table[DivisorSigma[1, ww]-wDivisorSigma[1, w], {w, 1, 256}]`
	CROSSREFS	`Cf. A000203, A000593, A046913.` `Sequence in context: A051238 A120984 A016480 this_sequence A147076 A027537 A002380` `Adjacent sequences: A086153 A086154 A086155 this_sequence A086157 A086158 A086159`
	KEYWORD	`nonn`
	AUTHOR	`Labos E. (labos(AT)ana.sote.hu), Aug 14 2003`

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Last modified December 20 00:58 EST 2009. Contains 171054 sequences.

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