Erroneous version of A051694.

Terms

a(0) =2a(1) =3a(2) =5a(3) =21a(4) =55a(5) =377a(6) =34a(7) =2584a(8) =46368a(9) =377a(10) =832040a(11) =4181a(12) =6763a(13) =987a(14) =196418