Number of forests of least height with n nodes.

Terms

a(0) =1a(1) =1a(2) =2a(3) =7a(4) =26a(5) =111a(6) =562a(7) =3151a(8) =19252a(9) =128449a(10) =925226a(11) =7125009a(12) =58399156a(13) =507222535a(14) =4647051970a(15) =44747776651a(16) =451520086208