References to A002181

Least number k such that phi(k) = n, where n runs through the values (A002202) taken by phi.
1, 3, 5, 7, 15, 11, 13, 17, 19, 25, 23, 35, 29, 31, 51, 37, 41, 43, 69, 47, 65, 53, 81, 87

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