Smallest prime p > 3 such that p-1 has a prime factor > (p-1)^(n/(n+1)).

Terms

a(0) =7a(1) =11a(2) =23a(3) =47a(4) =83a(5) =167a(6) =263a(7) =563a(8) =1187a(9) =2063a(10) =4127a(11) =8423a(12) =16487a(13) =32843a(14) =65543a(15) =131267a(16) =262643a(17) =524387a(18) =1048703a(19) =2097779a(20) =4195259a(21) =8389163a(22) =16777907a(23) =33554519a(24) =67109543a(25) =134217827a(26) =268436867a(27) =536871263a(28) =1073742623a(29) =2147483783