An alternating group is a group of even permutations on a set of length n, denoted A_n or Alt(n). Alternating groups are therefore permutation groups. The nth alternating group is represented in the Wolfram Language as AlternatingGroup[n]. An alternating group is a normal subgroup of the permutation group, and has group order n!/2, the first few values of which for n = 2, 3, ... are 1, 3, 12, 60, 360, 2520, ... (OEIS A001710). The alternating group A_n is (n - 2)-transitive.

15 puzzle | alternating group graph | cycle index | finite group | group | Jordan's symmetric group theorem | Lie group | permutation group | simple group | symmetric group