%I #5 Mar 30 2012 17:20:41
%S 0,0,0,0,1,6,21,56,126,251,461,786,1281,1981,2981,4311,6131,8436,
%T 11496,15246,20076,25851,33166,41656,52281,64436,79316,96151,116626,
%U 139246,166651,196751,232501,271601,317961,367616,426521,489506
%N Number of 5-tuples of different integers from [ 1,n ] with no global factor.
%K nonn
%O 1,6
%A _Olivier GĂ©rard_