OFFSET
1,1
COMMENTS
See comment in A243937.
If prime p is not in A062326, then p^2 is in the sequence.
If p>3 and p,p+2 are twin primes, then p*(p+2) is in the sequence. Indeed, it can be shown that in this case (p+1)^2 is in A243937. lpf((p+1)^2-1)=p while lpf((p+1)^2-3)=3, since for lesser p>3 of twin prime p+1==0(mod 6).
CROSSREFS
KEYWORD
nonn
AUTHOR
Vladimir Shevelev, Jul 16 2014
EXTENSIONS
More terms from Peter J. C. Moses, Jul 16 2014
STATUS
approved