Erroneous version of A223911: Tiered orders on n nodes.
A006860
Erroneous version of A223911: Tiered orders on n nodes.
Terms
- a(0) =1a(1) =3a(2) =13a(3) =111a(4) =1381a(5) =25623a(6) =678133a(7) =26269735a(8) =1447451707a(9) =114973020921
External references
- oeis: A006860