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A065728 Partition numbers (A000041) that are semiprimes (A001358). +0
3
15, 22, 77, 1255, 2012558, 2679689, 9289091, 18004327, 38887673, 56634173, 72533807, 82010177, 104651419, 2056148051, 2552338241, 20390982757, 27517052599, 118159068427, 749474411781, 5134205287973, 18028182516671 (list; graph; listen)
OFFSET

0,1

COMMENT

Enoch Haga (enochhaga(AT)msn.com) asks if this is be a finite sequence. The larger these numbers get, the more opportunity for more factors.

LINKS

Hisanori Mishima, Factor ization results

Eric Weisstein's World of Mathematics, Link to a section of The World of Mathematics.

EXAMPLE

E.g. the 808-th partition number 8151756509675604512522473567 = 5963320232189 * 1366982853893003.

CROSSREFS

Intersection of A001358 and A000041. Cf. A049575, A065729.

Sequence in context: A114867 A109288 A018889 this_sequence A014312 A129387 A111151

Adjacent sequences: A065725 A065726 A065727 this_sequence A065729 A065730 A065731

KEYWORD

nonn

AUTHOR

Patrick De Geest (pdg(AT)worldofnumbers.com), Nov 18 2001.

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Last modified September 7 14:45 EDT 2008. Contains 143483 sequences.


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