Number of noncrossing path sets on n nodes up to rotation and reflection with each path having at least two nodes.

A303839

Number of noncrossing path sets on n nodes up to rotation and reflection with each path having at least two nodes.

Terms

    a(0) =1a(1) =0a(2) =1a(3) =1a(4) =3a(5) =5a(6) =17a(7) =40a(8) =138a(9) =430a(10) =1546a(11) =5478a(12) =20525a(13) =77310a(14) =298301a(15) =1161692a(16) =4583525a(17) =18239037a(18) =73221198a(19) =296046399a(20) =1205038270a(21) =4933969005a(22) =20311807087a(23) =84029440358a(24) =349201537324

External references