Number of mobiles (circular rooted trees) with n nodes and 5 leaves.

Terms

a(0) =1a(1) =5a(2) =25a(3) =96a(4) =300a(5) =811a(6) =1951a(7) =4293a(8) =8782a(9) =16917a(10) =30973a(11) =54302a(12) =91696a(13) =149856a(14) =237936a(15) =368234a(16) =556973a(17) =825275a(18) =1200241a(19) =1716266a(20) =2416494a(21) =3354545a(22) =4596419a(23) =6222721a(24) =8331088a(25) =11039003a(26) =14486835a(27) =18841334a(28) =24299386a(29) =31092284