Second column of A027466.

Terms

a(0) =1a(1) =14a(2) =147a(3) =1372a(4) =12005a(5) =100842a(6) =823543a(7) =6588344a(8) =51883209a(9) =403536070a(10) =3107227739a(11) =23727920916a(12) =179936733613