Numbers k such that 131*2^k+1 is prime.

Terms

a(0) =1a(1) =3a(2) =9a(3) =13a(4) =19a(5) =21a(6) =25a(7) =51a(8) =55a(9) =97a(10) =153a(11) =165a(12) =199a(13) =261a(14) =285a(15) =361a(16) =373a(17) =465a(18) =475a(19) =529a(20) =765a(21) =2065a(22) =3553a(23) =4377a(24) =5421a(25) =6859a(26) =7371a(27) =11815a(28) =21657a(29) =29089