Largest prime factor of the n-th Pell number, A000129(n).

Terms

a(0) =2a(1) =5a(2) =3a(3) =29a(4) =7a(5) =13a(6) =17a(7) =197a(8) =41a(9) =5741a(10) =11a(11) =33461a(12) =239a(13) =269a(14) =577a(15) =8297a(16) =199a(17) =179057a(18) =59a(19) =45697a(20) =5741a(21) =982789a(22) =1153a(23) =29201a(24) =33461a(25) =146449a(26) =337a(27) =44560482149a(28) =269a(29) =3272609