Gullwing primes: primes in the gullwing sequence A187220.

Terms

a(0) =3a(1) =7a(2) =23a(3) =31a(4) =47a(5) =71a(6) =191a(7) =311a(8) =367a(9) =503a(10) =607a(11) =967a(12) =1303a(13) =1367a(14) =1439a(15) =1471a(16) =1663a(17) =1871a(18) =2399a(19) =4951a(20) =5471a(21) =5623a(22) =6263a(23) =9431a(24) =10103a(25) =10271a(26) =10687a(27) =12119a(28) =12511a(29) =14431