login
Number of 5-tuples of different integers from [ 1,n ] with no global factor.
0

%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_