 | ECS #321: Multiples of 9 |
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1. Description
Multiples of 9
2. Specification
This unlabelled structure is specified as S in
\displaystyle
\left\{ S={\rm Prod} \left( {\rm Union} \left( Z,Z,Z,Z,Z,Z,Z,Z,Z
\right) ,{\rm Sequence} \left( Z \right) ,{\rm Sequence} \left( Z
\right) \right) \right\}
other formats
3. Coefficients
3.1. First terms
3.2. Recurrence
\displaystyle
\left\{ f \left( n \right) -9\,n=0,f \left( 0 \right) =0,f \left( 1
\right) =9 \right\}
other formats
3.3. Closed form
\displaystyle
9\,n
other formats
3.4. Asymptotics
4. Ordinary generating function
\displaystyle
9\,{\frac {x}{ \left( -1+x \right) ^{2}}}
other formats
5. References
6. Random structure
Search a combinatorial structure by: (firstTerms should be a sequence of integers, separated by commas).