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

Terms

a(0) =1a(1) =8a(2) =80a(3) =524a(4) =2696a(5) =11398a(6) =41674a(7) =135315a(8) =398912a(9) =1083702a(10) =2746382a(11) =6552828a(12) =14833263a(13) =32050976a(14) =66448542a(15) =132748327a(16) =256487544a(17) =480786785a(18) =876729065a(19) =1558922942a(20) =2708486023a(21) =4606366231a(22) =7681025200a(23) =12575626106a(24) =20241643485