Erroneous version of A030534.

Terms

a(0) =1a(1) =2a(2) =10a(3) =40a(4) =185a(5) =828a(6) =3805a(7) =17411a(8) =80177a(9) =369639a(10) =1710137a(11) =7931011a(12) =36884730