Number of 4-ary rooted trees with n nodes and height exactly 9.

Terms

a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =0a(6) =0a(7) =0a(8) =0a(9) =1a(10) =8a(11) =43a(12) =188a(13) =720a(14) =2522a(15) =8288a(16) =25973a(17) =78506a(18) =230716a(19) =663100a(20) =1871936a(21) =5207632a(22) =14312497a(23) =38937270a(24) =105015752a(25) =281132871a(26) =747756946a(27) =1977633148a(28) =5204143935a(29) =13633435312