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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
(list; graph; refs; listen; history; text; internal format)
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 October 21 06:37 EDT 2024. Contains 376969 sequences.
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