OFFSET
1,1
COMMENTS
Appears (at least initially) to contain more primes that the analogous sequences for 2^k-1 or 2^k-3. Compare the comment of Paul Bourdelais in A050414.
EXAMPLE
7 is a term, because 3*2^7 - 25 = 359 is prime.
MATHEMATICA
Select[Range[100], PrimeQ[3 2^# - 25] &]
PROG
(PARI) for(n=0, 2000, if(ispseudoprime(p=3*2^n-25), print1(n, ", ")));
CROSSREFS
KEYWORD
nonn
AUTHOR
Gilbert Mozzo, Nov 07 2018
STATUS
approved