id:A049058 - OEIS Search Results

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Second element s of (-1)sigma sociable triple (r,s,t): s=(-1)sigma(r), t=(-1)sigma(s), r=(-1)sigma(t), where if x=Product p(i)^r(i), then (-1)sigma(x)=Product(-1+(Sum p(i)^s(i), s(i)=1 to r(i))).

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60, 120, 480, 1464, 7680, 24504, 490080 (list; graph; listen)

	OFFSET	`0,1`
	EXAMPLE	`Factorizations 2^235, 2^335, 2^535, 2^3361, 2^935, 2^331021, 2^535*1021`
	CROSSREFS	`Cf. A049057, A049059, A049060.` `Sequence in context: A098136 A060793 A087004 this_sequence A056501 A056491 A044247` `Adjacent sequences: A049055 A049056 A049057 this_sequence A049059 A049060 A049061`
	KEYWORD	`nonn`
	AUTHOR	`Yasutoshi Kohmoto (zbi74583(AT)boat.zero.ad.jp)`

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Last modified July 25 07:41 EDT 2008. Contains 142293 sequences.

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