Number of rooted identity trees with n nodes and 3 leaves.

Terms

a(0) =1a(1) =5a(2) =13a(3) =28a(4) =53a(5) =91a(6) =146a(7) =223a(8) =326a(9) =461a(10) =634a(11) =851a(12) =1119a(13) =1446a(14) =1839a(15) =2307a(16) =2859a(17) =3504a(18) =4252a(19) =5114a(20) =6100a(21) =7222a(22) =8492a(23) =9922a(24) =11525a(25) =13315a(26) =15305a(27) =17510a(28) =19945a(29) =22625