 | ECS #404 |
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1. Description
No description available
2. Specification
This unlabelled structure is specified as S in
\displaystyle
\left\{ B={\rm Prod} \left( C,Z \right) ,C={\rm Union} \left( Z,S
\right) ,S={\rm Set} \left( B,1\leq {\rm card} \right) \right\}
other formats
3. Coefficients
3.1. First terms
4. Ordinary generating function
\displaystyle
[B \left( x \right) =C \left( x \right) x,C \left( x \right) =x+S
\left( x \right) ,S \left( x \right) ={{\rm e}^{\sum _{j_{{1}}=1}^{
\infty }{\frac {B \left( {x}^{j_{{1}}} \right) }{j_{{1}}}}}}-1,Z
\left( x \right) =x]
other formats
5. References
6. Random structure
Search a combinatorial structure by: (firstTerms should be a sequence of integers, separated by commas).