Number of connected labeled graded posets on n vertices.
A228551
Number of connected labeled graded posets on n vertices.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =12a(4) =146a(5) =2820a(6) =79682a(7) =3109932a(8) =163268786a(9) =11373086100
External references
- oeis: A228551