%I
%S 1,2,2,3,3,4,4,5,6,4,5,6,7,10,12,8,10,12,15,8,9,12,14,15,20,8,9,12,14,
%T 20,21,30
%N Table read by rows: for each n: the orders of the permutations of n elements, excluding those that are a divisor of the order of another permutation of n elements.
%e 1: 1, 2: 2, 3: 2 3, 4: 3 4, 5: 4 5 6, 6: 4 5 6, 7: 7 10 12...
%e Permutations of 7 elements have orders of 1, 2, 3, 4, 5, 6, 7, 10, 12, of which 7, 10 and 12 are not factors of any others.
%Y Cf. A000793.
%K easy,nonn,tabf
%O 1,2
%A Allen Tracht (atracht(AT)ix.netcom.com), Dec 08 2005
