Numbers k such that 7*4^k + 1 is prime.

Terms

a(0) =1a(1) =2a(2) =3a(3) =7a(4) =10a(5) =13a(6) =25a(7) =26a(8) =46a(9) =60a(10) =87a(11) =90a(12) =95a(13) =145a(14) =160a(15) =195a(16) =216a(17) =308a(18) =415a(19) =902a(20) =1128a(21) =3307a(22) =6748a(23) =7747a(24) =8348a(25) =11193a(26) =27243a(27) =44033a(28) =47665a(29) =103542