Number of rooted compound windmills with n nodes and leaves of 2 colors with no symmetries.

A032172

Number of rooted compound windmills with n nodes and leaves of 2 colors with no symmetries.

Terms

    a(0) =2a(1) =2a(2) =3a(3) =9a(4) =27a(5) =93a(6) =317a(7) =1148a(8) =4203a(9) =15781a(10) =60066a(11) =231968a(12) =905301a(13) =3567982a(14) =14175319a(15) =56722193a(16) =228380002a(17) =924598874a(18) =3761536993a(19) =15370095298a(20) =63051505041a(21) =259573763572

External references