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Number of 5-tuples of different integers from [ 2,n ] with no common factors among triples.
0

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

%S 0,0,0,0,0,3,6,21,36,111,142,336,463,725,965,1769,2060,3461,4156,5633,

%T 6846,10371,11585,16147,18924,23973,27508,37822,40704,54583,61865,

%U 74222,83539,102970,110719,141215,156763,182613,198681

%N Number of 5-tuples of different integers from [ 2,n ] with no common factors among triples.

%K nonn

%O 2,6

%A _Olivier GĂ©rard_