 | ECS #148 |
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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( Z,E \right) ,C={\rm Set} \left( B,1\leq {
\rm card} \right) ,E={\rm Sequence} \left( Z \right) ,S={\rm Set}
\left( C,1\leq {\rm card} \right) \right\}
other formats
3. Coefficients
3.1. First terms
4. Ordinary generating function
\displaystyle
{{\rm e}^{\sum _{j_{{2}}=1}^{\infty } \left( \left( {{\rm e}^{\sum _{j
_{{1}}=1}^{\infty }-{\frac { \left( {x}^{j_{{2}}} \right) ^{j_{{1}}}}{
\left( -1+ \left( {x}^{j_{{2}}} \right) ^{j_{{1}}} \right) j_{{1}}}}}}
-1 \right) {j_{{2}}}^{-1} \right) }}-1
other formats
5. References
6. Random structure
Search a combinatorial structure by: (firstTerms should be a sequence of integers, separated by commas).