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A222406 Number of isomorphism types of automorphism groups of semigroups of order n. 0
1, 2, 3, 5, 10, 14, 24, 38, 65 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..9.

A. Distler and T. Kelsey, The semigroups of order 9 and their automorphism groups, arXiv preprint arXiv:1301.6023, 2013.

CROSSREFS

Cf. A174511.

Sequence in context: A120610 A090859 A004681 * A044953 A297130 A044815

Adjacent sequences:  A222403 A222404 A222405 * A222407 A222408 A222409

KEYWORD

nonn,more,hard,nice

AUTHOR

N. J. A. Sloane, Feb 19 2013

STATUS

approved

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Last modified January 29 04:57 EST 2020. Contains 331335 sequences. (Running on oeis4.)