 | ECS #130 |
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1. Description
No description available
2. Specification
This unlabelled structure is specified as S in
\displaystyle
\left\{ B={\rm Cycle} \left( C \right) ,C={\rm Sequence} \left( Z,0<{
\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-\sum _{j_{{1}}=1}^{\infty }{\rm phi} \left( j_{{1}} \right)
\ln \left( {\frac {-1+{x}^{j_{{1}}}}{-1+2\,{x}^{j_{{1}}}}} \right) {j_
{{1}}}^{-1}+\sum _{j_{{1}}=1}^{\infty }{\rm phi} \left( j_{{1}}
\right) \ln \left( {\frac {-1+{x}^{j_{{1}}}}{-1+2\,{x}^{j_{{1}}}}}
\right) {j_{{1}}}^{-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).