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A211939
Number of distinct regular languages over unary alphabet, whose minimum regular expression has reverse Polish length n.
0
3, 1, 2, 2, 3, 4, 6, 7, 11, 15
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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:
A092155
A288725
A029336
*
A010280
A318556
A292148
Adjacent sequences:
A211936
A211937
A211938
*
A211940
A211941
A211942
KEYWORD
nonn
,
more
AUTHOR
Hermann Gruber
, Apr 26 2012
STATUS
approved
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Last modified August 17 23:27 EDT 2024. Contains 375255 sequences. (Running on oeis4.)