Number of 4-ary rooted trees with n nodes and height exactly 5.

Terms

a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =1a(6) =4a(7) =13a(8) =36a(9) =89a(10) =206a(11) =458a(12) =980a(13) =2048a(14) =4181a(15) =8393a(16) =16571a(17) =32318a(18) =62231a(19) =118663a(20) =224014a(21) =419419a(22) =778816a(23) =1435851a(24) =2628373a(25) =4780528a(26) =8639699a(27) =15522013a(28) =27723788a(29) =49241837