Semiprimes of the form k^2 + 4.

Terms

a(0) =4a(1) =85a(2) =365a(3) =445a(4) =533a(5) =629a(6) =965a(7) =1685a(8) =1853a(9) =2605a(10) =2813a(11) =3029a(12) =3973a(13) =4765a(14) =5045a(15) =5629a(16) =5933a(17) =6245a(18) =6893a(19) =8285a(20) =8653a(21) =11029a(22) =11453a(23) =11885a(24) =12773a(25) =14165a(26) =15133a(27) =16645a(28) =17165a(29) =17693