Primes dividing nonzero terms in A002065.

Terms

a(0) =3a(1) =13a(2) =61a(3) =151a(4) =211a(5) =223a(6) =739a(7) =1009a(8) =1531a(9) =4363a(10) =4513a(11) =5503a(12) =6277a(13) =6397a(14) =7753a(15) =7873a(16) =9463a(17) =11353a(18) =11587a(19) =11677a(20) =12007a(21) =12241a(22) =13669a(23) =15061a(24) =15391a(25) =17509a(26) =17791a(27) =21157a(28) =25243a(29) =25747