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.

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.

Links

Table of n, a(n) for n=1..32.

Crossrefs

Sequence in context: A038626 A195970 A223372 * A223290 A121089 A362697

Adjacent sequences: A180331 A180332 A180333 * A180335 A180336 A180337

Keyword

nonn

Author

Zak Seidov and T. D. Noe, Sep 08 2010

Status

approved