Number of 6-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.
A194726
Number of 6-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) =11a(3) =146a(4) =2131a(5) =32966a(6) =530526a(7) =8786436a(8) =148733571a(9) =2561439806a(10) =44731364266a(11) =790211926076
External references
- oeis: A194726