Primes arising in A090234.

Terms

a(0) =2a(1) =3a(2) =5a(3) =11a(4) =29a(5) =73a(6) =167a(7) =353a(8) =709a(9) =1399a(10) =2819a(11) =5987a(12) =13469a(13) =31379a(14) =73453a(15) =169151a(16) =379787a(17) =831031a(18) =1779097a(19) =3746051a(20) =7796147a(21) =16099711a(22) =33087851a(23) =67838549a(24) =139068731a(25) =285699959a(26) =589374871a(27) =1222450387a(28) =2549640251a(29) =5340811127