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A211931
Number of distinct regular languages over unary alphabet, whose minimum regular expression has alphabetic width n.
0
2, 3, 6, 14, 30, 72, 155
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OFFSET
1,1
LINKS
Table of n, a(n) for n=1..7.
Hermann Gruber, Jonathan Lee, and Jeffrey Shallit,
Enumerating regular expressions and their languages
, arXiv:1204.4982v1 [cs.FL]
CROSSREFS
Sequence in context:
A240749
A331684
A106364
*
A264078
A006444
A335242
Adjacent sequences:
A211928
A211929
A211930
*
A211932
A211933
A211934
KEYWORD
hard
,
more
,
nonn
AUTHOR
Hermann Gruber
, Apr 25 2012
STATUS
approved
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Last modified April 24 20:08 EDT 2024. Contains 371963 sequences. (Running on oeis4.)