Number of asymmetric mobiles (circular rooted trees) with n nodes and 8 leaves.

Terms

a(0) =1a(1) =11a(2) =83a(3) =466a(4) =2169a(5) =8627a(6) =30329a(7) =96046a(8) =278705a(9) =749989a(10) =1890917a(11) =4502409a(12) =10193231a(13) =22062915a(14) =45872186a(15) =91979858a(16) =178478201a(17) =336129391a(18) =615995687a(19) =1100970460a(20) =1922934406a(21) =3287809354a(22) =5511659178a(23) =9071898905a(24) =14679098822