Number of words either empty or beginning with the first letter of the ternary alphabet, where each letter of the alphabet occurs n times.
A208881
Number of words either empty or beginning with the first letter of the ternary alphabet, where each letter of the alphabet occurs n times.
Terms
- a(0) =1a(1) =2a(2) =30a(3) =560a(4) =11550a(5) =252252a(6) =5717712a(7) =133024320a(8) =3155170590a(9) =75957810500
External references
- oeis: A208881