id:A049059 - OEIS Search Results

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Third element t 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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52, 156, 780, 1248, 13260, 19968, 468480 (list; graph; listen)

	OFFSET	`0,1`
	EXAMPLE	`Factorizations 2^213, 2^2313, 2^23513, 2^5313, 2^2351317, 2^9313, 2^935*61`
	CROSSREFS	`Cf. A049057, A049058, A049060.` `Sequence in context: A044684 A044384 A044765 this_sequence A166390 A161478 A023417` `Adjacent sequences: A049056 A049057 A049058 this_sequence A049060 A049061 A049062`
	KEYWORD	`nonn`
	AUTHOR	`Yasutoshi Kohmoto (zbi74583(AT)boat.zero.ad.jp)`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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