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A180334
a(n) is the least number such that there are n semiprimes pq such that (p+1)(q+1) = a(n) for each semiprime.
1
9, 24, 72, 144, 576, 1080, 2160, 1440, 8640, 20160, 15120, 40320, 70560, 60480, 191520, 166320, 211680, 514080, 277200, 982800, 907200, 1663200, 831600, 720720, 2162160, 4989600, 2494800, 8648640, 5266800, 8845200, 8316000, 15724800
OFFSET
1,1
COMMENTS
See A180333 for the semiprimes for each n.
CROSSREFS
Sequence in context: A038626 A195970 A223372 * A223290 A121089 A362697
KEYWORD
nonn
AUTHOR
Zak Seidov and T. D. Noe, Sep 08 2010
STATUS
approved