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A038182 3-infinitary perfect numbers k: 3-i-sigma(k)=2*k where 3-i-sigma(.) = A049418(.). 1
6, 28, 3024, 6552, 27578880, 49266240, 49095705098695680 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..7.

J. O. M. Pedersen, Tables of Aliquot Cycles [Broken link]

J. O. M. Pedersen, Tables of Aliquot Cycles [Via Internet Archive Wayback-Machine]

J. O. M. Pedersen, Tables of Aliquot Cycles [Cached copy, pdf file only]

EXAMPLE

Factorizations: 2*3, 2^2*7, 2^4*3^3*7, 2^3*3^2*7*13, 2^9*3^4*5*7*19, 2^6*3*5*19*37*73, 2^10*3^6*5*19^2*127*379*757.

CROSSREFS

Cf. A037445, A038148.

Sequence in context: A066239 A097464 A166998 * A095723 A057246 A154895

Adjacent sequences:  A038179 A038180 A038181 * A038183 A038184 A038185

KEYWORD

nonn,nice

AUTHOR

Yasutoshi Kohmoto

EXTENSIONS

Definition shortened - R. J. Mathar, Oct 06 2010

STATUS

approved

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Last modified September 21 17:46 EDT 2019. Contains 327273 sequences. (Running on oeis4.)