%I #5 Mar 30 2012 17:20:41
%S 1,3,9,18,51,72,176,264,447,586,1128,1362,2374,2943,3868,4841,7578,
%T 8633,12828,14847,18432,21480,30081,33223,43022,49051,59449,66796,
%U 87627,93688,120554,134772,156325,173243,205164,219513,272331,298743
%N Number of ordered 5-tuples of integers from [ 1,n ] with no common factors among triples.
%K nonn
%O 1,2
%A _Olivier GĂ©rard_