Number of hierarchical orderings for n labeled elements with 2 possible classes A and B for levels l>=2. Labeled analog of A104460.
A109092
Number of hierarchical orderings for n labeled elements with 2 possible classes A and B for levels l>=2. Labeled analog of A104460.
Terms
- a(0) =1a(1) =6a(2) =53a(3) =619a(4) =8972a(5) =155067a(6) =3109269a(7) =70893872a(8) =1810283331a(9) =51151579619
External references
- oeis: A109092