Number of genealogical 1-2 rooted trees of height n.

A003686

Number of genealogical 1-2 rooted trees of height n.

Terms

    a(0) =1a(1) =2a(2) =3a(3) =5a(4) =11a(5) =41a(6) =371a(7) =13901a(8) =5033531a(9) =69782910161

External references