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

Terms

a(0) =1a(1) =1a(2) =1a(3) =2a(4) =4a(5) =9a(6) =19a(7) =45a(8) =106a(9) =259a(10) =634a(11) =1571a(12) =3886a(13) =9636a(14) =23819a(15) =58805a(16) =144762a(17) =355643a(18) =871563a(19) =2131756a(20) =5203504a(21) =12679584a(22) =30844884a(23) =74921740a(24) =181721534a(25) =440177403a(26) =1064871279a(27) =2573043334a(28) =6210105218a(29) =14971861206