a(n) = F(n)_F(n) where F() = Fibonacci numbers A000045.

Terms

a(0) =1a(1) =1a(2) =2a(3) =3a(4) =5a(5) =8a(6) =16a(7) =43a(8) =106a(9) =280a(10) =721a(11) =21316a(12) =109280a(13) =429033a(14) =2233210a(15) =8775424a(16) =4085769598a(17) =34540431364a(18) =292365761174