Ambivalent means that each element of the group A_n is a conjugate of its inverse element.
The only alternating groups A_n with real character table.
G. James and A. Kerber, The Representation Theory of the Symmetric Group, Encyclopedia of Maths. and its Appls., Vol. 16, Addison-Wesley, 1981, Reading, MA, U.S.A., p. 12, 1.2.12 and p. 14, 1.2.16.
Table of n, a(n) for n=1..7.
Sequence in context: A255055 A007674 A086719 * A075823 A191748 A102212
Adjacent sequences: A115197 A115198 A115199 * A115201 A115202 A115203
Wolfdieter Lang, Feb 23 2006