Number of n-ary words beginning with the first character of the alphabet, that can be built by inserting eight doublets into the initially empty word.
A194720
Number of n-ary words beginning with the first character of the alphabet, that can be built by inserting eight doublets into the initially empty word.
Terms
- a(0) =0a(1) =1a(2) =6435a(3) =381333a(4) =5068915a(5) =33563481a(6) =148733571a(7) =507709165a(8) =1443039123a(9) =3581326065a(10) =8006545891a(11) =16475259141a(12) =31690921395a(13) =57644499913a(14) =100028603715a(15) =166732334301a(16) =268424064211a(17) =419229350625a(18) =637511191203a(19) =946759829365
External references
- oeis: A194720