A046052 - OEIS (original) (raw)

F(12) has 6 known factors with C1133 remaining. [Updated by Walter Nissen, Apr 02 2010]

F(13) has 4 known factors with C2391 remaining.

F(14) has one known factor with C4880 remaining. [Updated by Matt C. Anderson, Feb 14 2010]

John Selfridge apparently conjectured that this sequence is not monotonic, so at some point a(n+1) < a(n). Related sequences such as A275377 and A275379 already exhibit such behavior. - Jeppe Stig Nielsen, Jun 08 2018

Factors are counted with multiplicity although it is unknown if all Fermat numbers are squarefree. - Jeppe Stig Nielsen, Jun 09 2018