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A211940
Number of distinct finite languages over unary alphabet, whose minimum regular expression has reverse Polish length 2n-1.
0
3, 2, 3, 5, 9, 14, 24, 41, 71, 118
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OFFSET
1,1
LINKS
Table of n, a(n) for n=1..10.
Hermann Gruber, Jonathan Lee, and Jeffrey Shallit,
Enumerating regular expressions and their languages
, arXiv:1204.4982v1 [cs.FL], 2012.
CROSSREFS
Sequence in context:
A241816
A243109
A206012
*
A230664
A374833
A175717
Adjacent sequences:
A211937
A211938
A211939
*
A211941
A211942
A211943
KEYWORD
nonn
,
more
AUTHOR
Hermann Gruber
, Apr 26 2012
STATUS
approved
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Last modified August 22 00:18 EDT 2024. Contains 375353 sequences. (Running on oeis4.)