First column of A027447.

Terms

a(0) =1a(1) =7a(2) =85a(3) =415a(4) =12019a(5) =13489a(6) =726301a(7) =3144919a(8) =30300391a(9) =32160403a(10) =4102360483a(11) =4301068993a(12) =758647585777a(13) =788807993197a(14) =817534859365