OFFSET
1,1
COMMENTS
Conjecture 1: this sequence contains all primes > 367.
(These conjectures have been checked for the first 161734 terms of A336957.)
When an odd prime p first divides a term of A336957 that term is equal to q*p where q < p is also a prime. It appears q is almost always 2 (the corresponding values of p form the present sequence), that there are 34 instances when q = 3 (see A337649), and q>3 happens just once, at A336957(5) = 35 when q=5 and p=7.
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Sep 26 2020
STATUS
approved