A128665 Least n-almost prime of the form semiprime + 1.

5, 10, 27, 16, 112, 96, 288, 896, 512, 1536, 2048, 10240, 12288, 36864, 49152, 98304, 196608, 393216, 1769472, 1572864, 3145728, 6291456, 8388608, 41943040, 50331648, 234881024, 201326592, 905969664, 805306368, 6039797760, 3221225472, 6442450944, 19327352832, 64424509440, 173946175488, 257698037760, 137438953472, 412316860416, 1236950581248, 3848290697216, 2199023255552, 10995116277760, 29686813949952

Offset: 1

Author

Ray Chandler, Mar 19 2007

Keywords

• nonn

Crossrefs

Cf. A005385, A109373, A109067, A109287, A109383.

Extensions

a(28)-a(43) from Donovan Johnson, Nov 24 2010