 | ECS #855: A simple grammar |
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1. Description
rooted ordered set partitions
2. Specification
This labelled structure is specified as S in
\displaystyle
\left\{ B={\rm Set} \left( Z,1\leq {\rm card} \right) ,C={\rm Sequence
} \left( B \right) ,S={\rm Prod} \left( Z,C \right) \right\}
other formats
3. Coefficients
3.1. First terms
3.2. Asymptotics
4. Exponential generating function
\displaystyle
-{\frac {x}{-2+{{\rm e}^{x}}}}
other formats
5. References
6. Random structure
Search a combinatorial structure by: (firstTerms should be a sequence of integers, separated by commas).