Number of orbits of length n in map whose periodic points are A059928.

Terms

a(0) =1a(1) =0a(2) =0a(3) =2a(4) =0a(5) =0a(6) =0a(7) =0a(8) =0a(9) =0a(10) =0a(11) =6a(12) =0a(13) =12a(14) =56a(15) =0a(16) =0a(17) =0a(18) =72a(19) =0a(20) =0a(21) =24a(22) =0a(23) =0a(24) =96a(25) =24a(26) =0a(27) =48a(28) =0a(29) =0