Euler transform of Pell-Lucas numbers.

Terms

a(0) =1a(1) =2a(2) =9a(3) =30a(4) =106a(5) =348a(6) =1153a(7) =3698a(8) =11798a(9) =37034a(10) =115294a(11) =355202a(12) =1086080a(13) =3294912a(14) =9931019a(15) =29745296a(16) =88597104a(17) =262508288a(18) =774073787a(19) =2272321666a(20) =6642701371a(21) =19342768210a(22) =56117550874a(23) =162247236638a(24) =467563212923