a(n) = A389805(2*n+1).

Terms

a(0) =1a(1) =1a(2) =1a(3) =2a(4) =4a(5) =14a(6) =64a(7) =305a(8) =1947a(9) =13352a(10) =111333a(11) =1026737a(12) =11107110a(13) =131349930