Number of asymmetric 2,3 cacti (triangular cacti with bridges).

Terms

a(0) =1a(1) =0a(2) =0a(3) =0a(4) =0a(5) =1a(6) =3a(7) =7a(8) =21a(9) =57a(10) =159a(11) =435a(12) =1217a(13) =3400a(14) =9633a(15) =27413a(16) =78733a(17) =227489a(18) =661984a(19) =1937211a(20) =5701733a(21) =16865522a(22) =50126650a(23) =149627241a(24) =448448400a(25) =1349060262a(26) =4072508115a(27) =12333762442a(28) =37466367898a(29) =114133581762