Erroneous version of A057752.

Terms

a(0) =86a(1) =19a(2) =20a(3) =37a(4) =127a(5) =336a(6) =748a(7) =1691a(8) =3088a(9) =11761a(10) =41524a(11) =95388a(12) =316706a(13) =712386