A015653 - OEIS

%I #5 Mar 30 2012 17:20:41

%S 1,4,15,36,95,162,345,555,942,1376,2277,3049,4694,6216,8560,11077,

%T 15491,18956,25626,31254,39682,47942,61624,71912,89989,105658,127911,

%U 148410,181397,204777,247269,282117,329934,373740,438398,487156

%N Number of ordered 5-tuples of integers from [ 1,n ] with no common factors among quadruples.

%K nonn

%O 1,2

%A _Olivier Gérard_