a(n) = prime(Pell(n)).

Terms

a(0) =2a(1) =3a(2) =11a(3) =37a(4) =109a(5) =349a(6) =1009a(7) =2801a(8) =7759a(9) =21157a(10) =56611a(11) =150107a(12) =394817a(13) =1031141a(14) =2676301a(15) =6908743a(16) =17756213a(17) =45456347a(18) =115973411a(19) =294965017a(20) =748174379a(21) =1893049583a(22) =4779198503a(23) =12041422223a(24) =30283040819a(25) =76031275933a(26) =190595971639a(27) =477106841977