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A153077
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Largest number m such that sigma(m) = A002110(n) where A002110(n) is the product of the first n primes.
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3
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5, 29, 116, 2309, 30029, 272264, 6715161, 154448901, 3696967556, 126321788241, 5984466237725, 304250263527209, 7475863618097156, 495878856926202725, 17521052944725830450, 1749278213298193453469, 65483587607609351045025
(list; graph; refs; listen; history; internal format)
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OFFSET
| 2,1
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LINKS
| Ray Chandler, Max Alekseyev, Table of n, a(n) for n = 2..24
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FORMULA
| a(n) = A057637(A002110(n)). - Chandler
a(A057704(n)) = A002110(A057704(n)) - 1. - Chandler
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EXAMPLE
| a(9) = 154448901. Sigma(154448901) = A002110(9) = 223092870 = 2*3*5*7*11*13*17*19*23.
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CROSSREFS
| Cf. A000203, A002110, A153076, A153078.
Sequence in context: A057721 A085151 A119494 * A000352 A034332 A146053
Adjacent sequences: A153074 A153075 A153076 * A153078 A153079 A153080
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KEYWORD
| nonn
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AUTHOR
| Donovan Johnson (donovan.johnson(AT)yahoo.com), Dec 19 2008
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EXTENSIONS
| Extended by Ray Chandler (rayjchandler(AT)sbcglobal.net), Dec 28 2008
Terms a(22)-a(24) in b-file from Max Alekseyev (maxale(AT)gmail.com), Jan 29 2012
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