Number of bi-indecomposable topologies on n labeled points.
A247660
Number of bi-indecomposable topologies on n labeled points.
Terms
- a(0) =1a(1) =2a(2) =15a(3) =229a(4) =5298a(5) =177661a(6) =8605831a(7) =601894158a(8) =60571434501
External references
- oeis: A247660