Number of unsymmetrical catafusenes with n hexagons (see reference for precise definition).

A045909

Number of unsymmetrical catafusenes with n hexagons (see reference for precise definition).

Terms

    a(0) =0a(1) =0a(2) =1a(3) =8a(4) =39a(5) =190a(6) =861a(7) =3943a(8) =17867a(9) =81496a(10) =372378a(11) =1709842a(12) =7879360a(13) =36454004a(14) =169239651a(15) =788311290a(16) =3683018475a(17) =17255646688a(18) =81056033636a(19) =381668479192

External references