Number of unlabeled 6-ary cacti having n polygons.
A054366
Number of unlabeled 6-ary cacti having n polygons.
Terms
- a(0) =1a(1) =1a(2) =6a(3) =21a(4) =146a(5) =1101a(6) =10632a(7) =107062a(8) =1151802a(9) =12845442a(10) =147845706a(11) =1743640908a(12) =20988257544a(13) =256987965379
External references
- oeis: A054366