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.

A194730

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.

Terms

    a(0) =1a(1) =1a(2) =19a(3) =442a(4) =11395a(5) =312814a(6) =8960878a(7) =264735892a(8) =8006545891a(9) =246643289830

External references