OFFSET
0,1
FORMULA
C = 0.5974953925664336... .
MATHEMATICA
digits = 105; Clear[f];
f[m_] := f[m] = Module[{s}, s[c_?NumericQ] := NSum[c^k!, {k, 1, m}, WorkingPrecision -> digits]; c /. FindRoot[s[c] == 1, {c, 1/2}, WorkingPrecision -> digits] // RealDigits // First];
f[1]; f[m = 2];
While[f[m] != f[m/2], m = 2 m; Print["m = ", m]];
f[m] (* Jean-François Alcover, Mar 10 2020 *)
CROSSREFS
KEYWORD
cons,nonn
AUTHOR
Benoit Cloitre, Jan 12 2003
STATUS
approved