A222406 - OEIS

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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

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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 [math.CO], 2013.

CROSSREFS

Sequence in context: A090859 A004681 A338589 * 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