Number of orbits of length n under a map whose periodic points seem to be counted by A006953.

Terms

a(0) =12a(1) =54a(2) =80a(3) =30a(4) =24a(5) =5400a(6) =0a(7) =990a(8) =1568a(9) =636a(10) =24a(11) =2720a(12) =0a(13) =240a(14) =5704a(15) =510a(16) =0a(17) =3835776a(18) =0a(19) =26724a(20) =3600a(21) =108a(22) =24a(23) =89760a(24) =0a(25) =240a(26) =1064a(27) =120a(28) =24a(29) =113569300