Numbers k such that k#*2^k-1 is prime, where k# = product of primes <= k.

Terms

a(0) =2a(1) =3a(2) =7a(3) =8a(4) =14a(5) =16a(6) =18a(7) =20a(8) =40a(9) =42a(10) =44a(11) =53a(12) =134a(13) =154a(14) =185a(15) =187a(16) =191a(17) =197a(18) =200a(19) =201a(20) =230a(21) =235a(22) =239a(23) =244a(24) =256a(25) =282a(26) =303a(27) =358a(28) =489a(29) =536