Primefree sequences in the OEIS

[Jud McCranie]

At 01:38 PM 10/21/2005, Alonso Del Arte wrote:
>I posted the question to PrimeFan at his Wikipedia user talk page.
>
>It seems to me that he meant the sequences considered in their
>infinite totality. A000578 should not contain any primes, since it's
>the sequence of cubes. And A002808 should certainly not contain
>primes.

That's true, but there should be many sequences in the database that are 
unclear.  One thing that comes to mind is sequences dealing with the 
Sierpenski problem, and related problems.  I don't know how many of the 
specific sequences are in the database, but some sequences are known to 
contain no primes, some are known to contain primes, and for some no prime 
in the sequence is known, but it is not known if there are any primes in 
the sequence or not.  I'm also thinking of sequences completely unrelated 
to primes.  The currently-known terms may not contain any primes, but that 
doesn't rule out the possibility of finding a prime.  Is he listing 
sequences known to not have any primes?