Number of 10-leaf rooted trees with n levels.

Terms

a(0) =0a(1) =1a(2) =42a(3) =817a(4) =8429a(5) =55627a(6) =268272a(7) =1030101a(8) =3331117a(9) =9425128a(10) =23970089a(11) =55880968a(12) =121188860a(13) =247272012a(14) =478904297a(15) =886654486a(16) =1578265414a(17) =2713745819a(18) =4525019252a(19) =7341094011a(20) =11619845543a(21) =17987638185a(22) =27288156478a(23) =40641967587a(24) =59518495595a(25) =85822255610