Number of asymmetric mobiles (circular rooted trees) with n nodes and 7 leaves.

Terms

a(0) =1a(1) =10a(2) =63a(3) =310a(4) =1260a(5) =4423a(6) =13772a(7) =38876a(8) =101036a(9) =244770a(10) =558083a(11) =1206992a(12) =2491908a(13) =4937234a(14) =9429273a(15) =17423919a(16) =31251810a(17) =54558739a(18) =92928819a(19) =154753337a(20) =252422630a(21) =403940910a(22) =635084757a(23) =982257860a(24) =1496223663