Number of distinct finite languages over 3-ary alphabet, whose minimum regular expression has reverse Polish length 2n-1.
A211944
Number of distinct finite languages over 3-ary alphabet, whose minimum regular expression has reverse Polish length 2n-1.
Terms
- a(0) =5a(1) =15a(2) =85a(3) =589a(4) =4512a(5) =37477a(6) =328718a(7) =2998039
External references
- oeis: A211944