198401

Appears in sequences

• Expansion of c(8*x^2)/(1 - x*c(8*x^2)), where c(x) is the g.f. of A000108.at n=9A132375
• Number of n-ary words beginning with the first character of the alphabet, that can be built by inserting five doublets into the initially empty word.at n=9A194717
• Number of 9-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=5A194729