Least k such that 2^(2^n)+k is prime.

Terms

a(0) =0a(1) =1a(2) =1a(3) =1a(4) =1a(5) =15a(6) =13a(7) =51a(8) =297a(9) =75a(10) =643a(11) =981a(12) =1761a(13) =897a(14) =2775a(15) =118113a(16) =44061a(17) =5851a(18) =18531a(19) =189093a(20) =69661