Number of free planar polyenoids with n nodes and symmetry point group C_s.

A000941

Number of free planar polyenoids with n nodes and symmetry point group C_s.

Terms

    a(0) =0a(1) =0a(2) =0a(3) =0a(4) =2a(5) =5a(6) =21a(7) =58a(8) =194a(9) =570a(10) =1790a(11) =5434a(12) =16924a(13) =52362a(14) =163784a(15) =512670a(16) =1614406a(17) =5096314a(18) =16150180

External references