 | ECS #69: Hierarchies |
| Introduction | Examples | Search | Submit | Help | Links |
1. Description
- Hierarchies
- Schroeder's fourth problem
2. Specification
This labelled structure is specified as S in
\displaystyle
\left\{ S={\rm Union} \left( Z,{\rm Set} \left( S,2\leq {\rm card}
\right) \right) \right\}
other formats
3. Coefficients
3.1. First terms
3.2. Asymptotics
4. Exponential generating function
\displaystyle
-{\rm LambertW} \left( -1/2\,{{\rm e}^{1/2\,x-1/2}} \right) +1/2\,x-1/2
other formats
5. References
6. Random structure
Search a combinatorial structure by: (firstTerms should be a sequence of integers, separated by commas).