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Number of ordered quadruples of integers from [ 2,n ] with no global factor.
0

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

%S 0,3,9,28,50,105,169,279,406,625,839,1202,1570,2086,2646,3461,4219,

%T 5358,6452,7899,9381,11404,13240,15805,18272,21383,24461,28520,32107,

%U 37066,41706,47395,52968,59990,66312,74747,82553,91969,100989,112468

%N Number of ordered quadruples of integers from [ 2,n ] with no global factor.

%K nonn

%O 2,2

%A _Olivier GĂ©rard_