Number of trees with n nodes and 7 leaves.

Terms

a(0) =1a(1) =3a(2) =12a(3) =39a(4) =119a(5) =325a(6) =833a(7) =1972a(8) =4411a(9) =9318a(10) =18789a(11) =36248a(12) =67361a(13) =120868a(14) =210354a(15) =355873a(16) =587070a(17) =946127a(18) =1493015a(19) =2310430a(20) =3512236a(21) =5251416a(22) =7732998a(23) =11226380a(24) =16084556a(25) =22762426a(26) =31844621a(27) =44072033a(28) =60380915a(29) =81940412