Number of labeled nonempty hypertrees (connected antichains with no cycles) spanning some subset of {1,...,n} without singleton edges.
A304939
Number of labeled nonempty hypertrees (connected antichains with no cycles) spanning some subset of {1,...,n} without singleton edges.
Terms
- a(0) =1a(1) =0a(2) =1a(3) =7a(4) =51a(5) =506a(6) =6843a(7) =118581a(8) =2504855a(9) =62370529a(10) =1788082153a(11) =57997339632
External references
- oeis: A304939