Numbers n such that n!! - 2^8 is prime.

Terms

a(0) =11a(1) =15a(2) =21a(3) =27a(4) =31a(5) =53a(6) =59a(7) =71a(8) =87a(9) =91a(10) =99a(11) =129a(12) =219a(13) =337a(14) =507a(15) =695a(16) =893a(17) =1033a(18) =1961a(19) =2381a(20) =3237a(21) =3485a(22) =6151a(23) =8981a(24) =17873a(25) =18163a(26) =33621a(27) =38543