 | ECS #60: Trees |
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1. Description
Labelled trees of height 4
2. Specification
This labelled structure is specified as S in
\displaystyle
\left\{ S={\rm Prod} \left( Z,{\rm Set} \left( {\rm T1} \right)
\right) ,{\rm T1}={\rm Prod} \left( Z,{\rm Set} \left( {\rm T2}
\right) \right) ,{\rm T2}={\rm Prod} \left( Z,{\rm Set} \left( {\rm
T3} \right) \right) ,{\rm T3}={\rm Prod} \left( Z,{\rm Set} \left( {
\rm T4} \right) \right) ,{\rm T4}=Z \right\}
other formats
3. Coefficients
3.1. First terms
4. Exponential generating function
\displaystyle
x{{\rm e}^{x{{\rm e}^{x{{\rm e}^{x{{\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).