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A239891
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List of orders of alternating groups which are unit groups of rings.
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1
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OFFSET
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1,3
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COMMENTS
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The groups in question are A_1, A_2, A_3, A-4 and A_8.
The rings are assumed to be associative and to have a unit element.
The analogous sequence when we consider symmetric groups is S_1, S_2, S_3 and S_4.
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LINKS
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Table of n, a(n) for n=1..5.
Christopher Davis, Tommy Occhipinti, Which alternating and symmetric groups are unit groups?, J. Algebra Appl., 13 (2014), no. 3, 1350114, 12 pp. MR3125882. [The source for this sequence]
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CROSSREFS
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Cf. A001710, A239892.
Sequence in context: A262541 A036300 A169815 * A226129 A167368 A318165
Adjacent sequences: A239888 A239889 A239890 * A239892 A239893 A239894
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KEYWORD
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nonn,fini,full
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AUTHOR
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N. J. A. Sloane, Apr 03 2014
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STATUS
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approved
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