%I #5 Mar 30 2012 17:20:41
%S 1,3,9,18,43,62,125,181,282,370,597,725,1090,1336,1709,2085,2873,3280,
%T 4366,5018,6054,6966,8854,9790,11943,13451,15744,17530,21237,22839,
%U 27331,30169,34186,37498,42916,45948,53484,58104,64699,69534,79743
%N Number of ordered quadruples of integers from [ 1,n ] with no common factors between triples.
%K nonn
%O 1,2
%A _Olivier GĂ©rard_