Generalized Pellian with second term equal to 8.

Terms

a(0) =1a(1) =8a(2) =17a(3) =42a(4) =101a(5) =244a(6) =589a(7) =1422a(8) =3433a(9) =8288a(10) =20009a(11) =48306a(12) =116621a(13) =281548a(14) =679717a(15) =1640982a(16) =3961681a(17) =9564344a(18) =23090369a(19) =55745082a(20) =134580533a(21) =324906148a(22) =784392829a(23) =1893691806a(24) =4571776441a(25) =11037244688