Number of polygonal cacti on 2n-1 unlabeled nodes with every polygon having an odd prime number of edges.
A332650
Number of polygonal cacti on 2n-1 unlabeled nodes with every polygon having an odd prime number of edges.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =10a(5) =30a(6) =105a(7) =400a(8) =1654a(9) =7229a(10) =32944a(11) =154749a(12) =744973a(13) =3655993a(14) =18232812a(15) =92162974a(16) =471301437a(17) =2434542190a(18) =12687850499a(19) =66646225443a(20) =352548333438
External references
- oeis: A332650