Number of orbits of length n under the map whose periodic points are counted by A001350.

Terms

a(0) =1a(1) =0a(2) =1a(3) =1a(4) =2a(5) =2a(6) =4a(7) =5a(8) =8a(9) =11a(10) =18a(11) =25a(12) =40a(13) =58a(14) =90a(15) =135a(16) =210a(17) =316a(18) =492a(19) =750a(20) =1164a(21) =1791a(22) =2786a(23) =4305a(24) =6710a(25) =10420a(26) =16264a(27) =25350a(28) =39650a(29) =61967