List of primitive prime divisors of the Somos-4 sequence (A006720) in their order of occurrence.

Terms

a(0) =2a(1) =3a(2) =7a(3) =23a(4) =59a(5) =157a(6) =11a(7) =139a(8) =8209a(9) =9257a(10) =620297a(11) =983a(12) =4003a(13) =1847a(14) =9803a(15) =1687054711a(16) =1433a(17) =33008447a(18) =83a(19) =101a(20) =113a(21) =51563a(22) =61a(23) =823a(24) =5381a(25) =20117a(26) =6329a(27) =262650531833a(28) =197a(29) =10259