Number of connected partially ordered sets with n labeled points.
A001927
Number of connected partially ordered sets with n labeled points.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =12a(4) =146a(5) =3060a(6) =101642a(7) =5106612a(8) =377403266a(9) =40299722580
External references
- oeis: A001927