Number of unlabeled asymmetric 7-ary cacti having n polygons.

A054370

Number of unlabeled asymmetric 7-ary cacti having n polygons.

Terms

    a(0) =1a(1) =1a(2) =0a(3) =21a(4) =182a(5) =2093a(6) =23394a(7) =285383a(8) =3621150a(9) =47813367a(10) =650302814a(11) =9066061193a(12) =128986881660

External references