Number of n-node rooted identity trees of height at most 6.

Terms

a(0) =1a(1) =1a(2) =1a(3) =2a(4) =3a(5) =6a(6) =12a(7) =24a(8) =45a(9) =85a(10) =157a(11) =289a(12) =529a(13) =969a(14) =1764a(15) =3208a(16) =5807a(17) =10493a(18) =18901a(19) =33977a(20) =60919a(21) =109019a(22) =194662a(23) =346940a(24) =617148a(25) =1095884a(26) =1942576a(27) =3437834a(28) =6074239a(29) =10716076