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.

A194721

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.

Terms

    a(0) =0a(1) =1a(2) =24310a(3) =2699837a(4) =52955950a(5) =464221105a(6) =2561439806a(7) =10466643805a(8) =34648845862a(9) =98156060225a(10) =246643289830a(11) =563506356061

External references