Sum[Sum[(n!/e)^(-m-1) (1/pi atan(tan(pi/e n!)))^m, {n, 2, 5}],{m,0,5}] Sum[Sum[(n!/e)^(-m-1) (1/pi atan(tan(pi/e n!)))^m, {n, 2, 5}],{m,0,5}]

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