OFFSET
2,1
COMMENTS
That is, the largest number k such that phi(k) = x, with x being the least number having n solutions. - T. D. Noe, Apr 14 2013
LINKS
T. D. Noe, Table of n, a(n) for n = 2..1023
D. Bressoud, CNT.m Computational Number Theory Mathematica package.
MATHEMATICA
Needs["CNT`"]; nn = 50; t = Table[0, {nn}]; n = 0; left = nn - 1; While[left > 0, n++; cnt = Length[PhiInverse[n]]; If[cnt <= nn && t[[cnt]] == 0, t[[cnt]] = n; left--]]; Join[{0}, Table[PhiInverse[n][[-1]], {n, Rest[t]}]]
CROSSREFS
KEYWORD
nonn
AUTHOR
T. D. Noe, Apr 11 2013
STATUS
approved