Primes in sequence a(1)=2, a(n+1)=2^a(n)-3^(n-1).A117696Primes in sequence a(1)=2, a(n+1)=2^a(n)-3^(n-1).Terms a(0) =2a(1) =3a(2) =5a(3) =23a(4) =8388581External referencesoeis: A117696