a(n) = L(P(n)), where L = Lucas numbers A000032, P = Pell numbers A000129.

A081323

a(n) = L(P(n)), where L = Lucas numbers A000032, P = Pell numbers A000129.

Terms

    a(0) =2a(1) =1a(2) =3a(3) =11a(4) =322a(5) =1149851

External references