OFFSET
0,1
REFERENCES
Francois Le Lionnais, Les nombres remarquables, Paris, Hermann, 1983, p. 25.
EXAMPLE
-0.3847901973793791729759092256322942220633230399509112463798587588...
MATHEMATICA
digits = 105;
x[n_Integer] := x[n] = BesselJZero[1, n];
f[n_Integer] := f[n] = 1/(x[n] BesselJ[0, x[n]]);
NSum[f[n], {n, 1, Infinity}, Method -> "AlternatingSigns", WorkingPrecision -> digits+10] // RealDigits[#, 10, digits][[1]]&
CROSSREFS
KEYWORD
nonn,cons
AUTHOR
Jean-François Alcover, Jan 21 2021
STATUS
approved