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

A091481

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

Terms

    a(0) =1a(1) =2a(2) =12a(3) =112a(4) =1450a(5) =23976a(6) =482944a(7) =11472896a(8) =314061948a(9) =9734500000a(10) =336998573296

External references