Primes dividing nonzero terms in A003095: the iterates of x^2 + 1 starting at 0.

Terms

a(0) =2a(1) =5a(2) =13a(3) =41a(4) =137a(5) =149a(6) =229a(7) =293a(8) =397a(9) =509a(10) =661a(11) =677a(12) =709a(13) =761a(14) =809a(15) =877a(16) =881a(17) =1217a(18) =1249a(19) =1277a(20) =1601a(21) =2053a(22) =2633a(23) =3637a(24) =3701a(25) =4481a(26) =4729a(27) =5101a(28) =5449a(29) =5749