Number of unlabeled topologies with up to n points.
A326898
Number of unlabeled topologies with up to n points.
Terms
- a(0) =1a(1) =2a(2) =5a(3) =14a(4) =47a(5) =186a(6) =904a(7) =5439a(8) =41418a(9) =404501a(10) =5122188a(11) =84623842a(12) =1828876351a(13) =51701216248
External references
- oeis: A326898