Number of prime unlabeled T_0 topologies (i.e., prime T_0 homeomorphism classes) on n points.
A028856
Number of prime unlabeled T_0 topologies (i.e., prime T_0 homeomorphism classes) on n points.
Terms
- a(0) =2a(1) =5a(2) =13a(3) =63a(4) =308a(5) =2045a(6) =16969a(7) =183216a(8) =2567158a(9) =46749427
External references
- oeis: A028856