Number of n-node rooted identity trees of height 4.

Terms

a(0) =1a(1) =3a(2) =5a(3) =8a(4) =12a(5) =17a(6) =23a(7) =32a(8) =41a(9) =52a(10) =66a(11) =83a(12) =102a(13) =124a(14) =152a(15) =181a(16) =216a(17) =255a(18) =299a(19) =346a(20) =400a(21) =458a(22) =521a(23) =588a(24) =659a(25) =735a(26) =814a(27) =896a(28) =979a(29) =1067