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Quadruples of different integers from [ 2,n ] with no common factors between pairs.
0

%I #4 Mar 30 2012 17:20:41

%S 0,0,0,0,0,2,3,6,6,26,27,72,79,90,109,228,238,431,461,523,565,928,963,

%T 1255,1349,1597,1697,2499,2534,3571,3878,4253,4510,5056,5189,6979,

%U 7369,8006,8282,10800,10956,13978,14607,15362,16098,20114,20521,23743

%N Quadruples of different integers from [ 2,n ] with no common factors between pairs.

%K nonn

%O 2,6

%A _Olivier GĂ©rard_