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A211937 Number of distinct regular languages over 4-ary alphabet, whose minimum regular expression has alphabetic width n 0
2, 12, 288, 9312, 357911 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..5.

Hermann Gruber, Jonathan Lee, and Jeffrey Shallit, Enumerating regular expressions and their languages, arXiv:1204.4982v1 [cs.FL]

CROSSREFS

Sequence in context: A012754 A083568 A003121 * A176037 A057170 A200564

Adjacent sequences:  A211934 A211935 A211936 * A211938 A211939 A211940

KEYWORD

nonn

AUTHOR

Hermann Gruber, Apr 25 2012

STATUS

approved

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Last modified July 17 08:42 EDT 2019. Contains 325098 sequences. (Running on oeis4.)