A211943 Number of distinct regular languages over 3-ary alphabet, whose minimum regular expression has reverse Polish length n.
5, 3, 15, 33, 106, 361, 1012, 3859, 11655, 43431
Offset: 1
Links
- Hermann Gruber, Jonathan Lee, and Jeffrey Shallit, Enumerating regular expressions and their languages, arXiv:1204.4982v1 [cs.FL], 2012.