First column of A027517.

Terms

a(0) =1a(1) =7a(2) =85a(3) =814a(4) =102727a(5) =12277291a(6) =46825417a(7) =65344835a(8) =84274153a(9) =112772640a(10) =2289634277a(11) =3032809277