Number of n-node rooted identity trees of height at most 7.

Terms

a(0) =1a(1) =1a(2) =1a(3) =2a(4) =3a(5) =6a(6) =12a(7) =25a(8) =51a(9) =105a(10) =211a(11) =421a(12) =832a(13) =1641a(14) =3224a(15) =6328a(16) =12382a(17) =24200a(18) =47197a(19) =91915a(20) =178683a(21) =346897a(22) =672443a(23) =1301850a(24) =2517078a(25) =4860938a(26) =9376300a(27) =18066270a(28) =34772627a(29) =66859667