Second column of A027447.

Terms

a(0) =1a(1) =19a(2) =115a(3) =3799a(4) =4669a(5) =268921a(6) =1227199a(7) =12335311a(8) =13560283a(9) =1781891563a(10) =1916566873a(11) =345677548297a(12) =366562289317a(13) =386631866845