%I A014573
%S A014573 3,0,1,2,4,8,12,32,36,40,24,48,160,396,2268,704,312,72,336,216,936,144,
%T A014573 624,1056,1760,360,2560,384,288,1320,3696,240,768,9000,432,7128,4200,
%U A014573 480,576,1296,1200,15936,3312,3072,3240,864,3120,7344,3888,720,1680
%N A014573 Smallest k such that phi(x) = k has exactly n solutions.
%C A014573 Carmichael conjectured that no term exists for n=1.
%D A014573 M. Abramowitz and I. A. Stegun, eds., Handbook of Mathematical Functions, 
               National Bureau of Standards Applied Math. Series 55, 1964 (and various 
               reprintings), p. 840.
%H A014573 M. Abramowitz and I. A. Stegun, eds., <a href="http://www.nrbook.com/
               abramowitz_and_stegun/">Handbook of Mathematical Functions</a>, National 
               Bureau of Standards, Applied Math. Series 55, Tenth Printing, 1972 
               [alternative scanned copy].
%H A014573 Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/
               CarmichaelsTotientFunctionConjecture.html">Carmichael's Totient Function 
               conjecture</a>
%Y A014573 Cf. A000010. Essentially same as A007374, which is the main entry for 
               this sequence.
%Y A014573 Sequence in context: A147755 A136748 A049765 this_sequence A067166 A125209 
               A071818
%Y A014573 Adjacent sequences: A014570 A014571 A014572 this_sequence A014574 A014575 
               A014576
%K A014573 nonn,easy
%O A014573 0,1
%A A014573 Eric Weisstein (eric(AT)weisstein.com)
%E A014573 Link fixed by Charles R Greathouse IV (charles.greathouse(AT)case.edu), 
               Oct 06 2009