login
A239891
List of orders of alternating groups which are unit groups of rings.
1
1, 1, 3, 12, 20160
OFFSET
1,3
COMMENTS
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.
LINKS
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]
CROSSREFS
Sequence in context: A262541 A036300 A169815 * A226129 A167368 A318165
KEYWORD
nonn,fini,full
AUTHOR
N. J. A. Sloane, Apr 03 2014
STATUS
approved