246643289830
domain: N
Appears in sequences
- Generalized central coefficients for k=3.at n=17A121725
- Number of n-ary words beginning with the first character of the alphabet, that can be built by inserting nine doublets into the initially empty word.at n=10A194721
- Number of 10-ary words either empty or beginning with the first character of the alphabet, that can be built by inserting n doublets into the initially empty word.at n=9A194730