 | ECS #772: A simple grammar |
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1. Description
No description available
2. Specification
This unlabelled structure is specified as S in
\displaystyle
\left\{ B={\rm Set} \left( C \right) ,C={\rm Sequence} \left( Z,1\leq
{\rm card} \right) ,S={\rm Union} \left( C,B \right) \right\}
other formats
3. Coefficients
3.1. First terms
4. Ordinary generating function
\displaystyle
\left( -x-{{\rm e}^{\sum _{j_{{1}}=1}^{\infty }-{\frac {{x}^{j_{{1}}}}
{ \left( -1+{x}^{j_{{1}}} \right) j_{{1}}}}}}+{{\rm e}^{\sum _{j_{{1}}=
1}^{\infty }-{\frac {{x}^{j_{{1}}}}{ \left( -1+{x}^{j_{{1}}} \right) j_
{{1}}}}}}x \right) \left( -1+x \right) ^{-1}
other formats
5. References
6. Random structure
Search a combinatorial structure by: (firstTerms should be a sequence of integers, separated by commas).