Number of asymmetric rooted polygonal cacti with bridges (mixed Husimi trees).

Terms

a(0) =0a(1) =1a(2) =1a(3) =1a(4) =3a(5) =7a(6) =22a(7) =67a(8) =215a(9) =692a(10) =2283a(11) =7599a(12) =25631a(13) =87211a(14) =299386a(15) =1035059a(16) =3602083a(17) =12606318a(18) =44344764a(19) =156698081a(20) =555989604a(21) =1980050697a(22) =7075365521a(23) =25360341963a(24) =91155701023a(25) =328500571740