a(n) = A078223(n+1)/A078223(n).

Terms

a(0) =2a(1) =2a(2) =3a(3) =2a(4) =6a(5) =3a(6) =7a(7) =43a(8) =101a(9) =1526a(10) =21626a(11) =30507a(12) =767145938