Numbers k such that k!! + 2^8 is prime.

Terms

a(0) =0a(1) =1a(2) =5a(3) =9a(4) =11a(5) =13a(6) =23a(7) =135a(8) =187a(9) =215a(10) =233a(11) =313a(12) =333a(13) =493a(14) =1459a(15) =2753a(16) =2813a(17) =6411a(18) =31191a(19) =38303a(20) =41487