 | ECS #119 |
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1. Description
No description available
2. Specification
This unlabelled structure is specified as S in
\displaystyle
\left\{ B={\rm Union} \left( {\rm Epsilon},Z \right) ,C={\rm Prod}
\left( B,Z \right) ,S={\rm Cycle} \left( C \right) \right\}
other formats
3. Coefficients
3.1. First terms
4. Ordinary generating function
\displaystyle
\sum _{j_{{1}}=1}^{\infty }{\frac {{\rm phi} \left( j_{{1}} \right)
\ln \left( \left( 1-{x}^{j_{{1}}}- \left( {x}^{j_{{1}}} \right) ^{2}
\right) ^{-1} \right) }{j_{{1}}}}
other formats
5. References
6. Random structure
Search a combinatorial structure by: (firstTerms should be a sequence of integers, separated by commas).