Number of 4-ary rooted trees with n nodes and height exactly 8.

Terms

a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =0a(6) =0a(7) =0a(8) =1a(9) =7a(10) =34a(11) =136a(12) =480a(13) =1560a(14) =4784a(15) =14056a(16) =39992a(17) =111001a(18) =302110a(19) =809398a(20) =2140595a(21) =5600396a(22) =14518475a(23) =37342551a(24) =95390479a(25) =242204920a(26) =611682570a(27) =1537362741a(28) =3847104992a(29) =9588937190