Number of distinct finite languages over 4-ary alphabet, whose minimum regular expression has alphabetic width n.
A211938
Number of distinct finite languages over 4-ary alphabet, whose minimum regular expression has alphabetic width n.
Terms
- a(0) =2a(1) =8a(2) =112a(3) =2164a(4) =51008a(5) =1346924
External references
- oeis: A211938