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Quadruples of different integers from [ 1,n ] with no global factor.
0

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

%S 0,0,0,1,5,15,35,69,125,205,325,479,699,965,1325,1745,2305,2919,3735,

%T 4619,5739,6949,8489,10061,12081,14161,16705,19343,22619,25819,29879,

%U 33919,38759,43655,49615,55325,62465,69419,77635,85771,95651,104895

%N Quadruples of different integers from [ 1,n ] with no global factor.

%K nonn

%O 1,5

%A _Olivier GĂ©rard_