2467137

Appears in sequences

• Generalized central binomial coefficients for k=2.at n=13A121724
• Number of n-ary words beginning with the first character of the alphabet, that can be built by inserting seven doublets into the initially empty word.at n=5A194719
• Number of 5-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=7A194725