Number of hypermaps which are self-equivalent with respect to reversing the colors of the nodes and which have n edges.
A289678
Number of hypermaps which are self-equivalent with respect to reversing the colors of the nodes and which have n edges.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =6a(4) =15a(5) =42a(6) =131a(7) =442a(8) =1551a(9) =5723a(10) =22171a(11) =89156a(12) =370199a(13) =1589240a(14) =7020127a(15) =31906974
External references
- oeis: A289678