id:A153800 - OEIS Search Results

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Indices of multiply-perfect numbers that are also perfect numbers.

+0
6

2, 3, 5, 7, 13, 19, 25, 41, 110, 192 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`a(7) is 25 because the 25th multiply-perfect number A007691(25)=137438691328 is also the 7th perfect number A000396(7).`
	CROSSREFS	`cF. A000396, A007691.` `Sequence in context: A038917 A134266 A062252 this_sequence A147791 A072467 A062326` `Adjacent sequences: A153797 A153798 A153799 this_sequence A153801 A153802 A153803`
	KEYWORD	`more,nonn`
	AUTHOR	`Omar E. Pol (info(AT)polprimos.com), Jan 13 2009`

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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.