Number of set-systems S composed of nonempty subsets of [n] such that any element k in S appears at most k times.
A374453
Number of set-systems S composed of nonempty subsets of [n] such that any element k in S appears at most k times.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =36a(4) =547a(5) =26672a(6) =5120069a(7) =4581266029
External references
- oeis: A374453