Number of orbits of length n under a map whose periodic points are counted by A056045.

Terms

a(0) =1a(1) =1a(2) =1a(3) =2a(4) =1a(5) =6a(6) =1a(7) =12a(8) =10a(9) =30a(10) =1a(11) =139a(12) =1a(13) =252a(14) =231a(15) =920a(16) =1a(17) =3780a(18) =1a(19) =10250a(20) =5601a(21) =32076a(22) =1a(23) =149390a(24) =2126a(25) =400036a(26) =173692a(27) =1475642a(28) =1a(29) =6196651