Smallest prime p such that n applications of f lead form p to 2, where f is the mapping of primes > 2 to primes defined by A052248.

A080190

Smallest prime p such that n applications of f lead form p to 2, where f is the mapping of primes > 2 to primes defined by A052248.

Terms

    a(0) =2a(1) =3a(2) =5a(3) =7a(4) =13a(5) =23a(6) =43a(7) =83a(8) =163a(9) =317a(10) =631a(11) =1259a(12) =2503a(13) =5003a(14) =9973a(15) =19937a(16) =39869a(17) =119617a(18) =239233a(19) =480023a(20) =960031a(21) =1920049a(22) =3840091a(23) =7680181a(24) =15360361a(25) =30720719a(26) =61441379a(27) =122882741a(28) =245765449a(29) =491530873

External references