OFFSET
1,1
FORMULA
(constant in A371503) - (this constant) = 0.33333333365451421006976562532...
EXAMPLE
0.833531745871155593397388541101...
MATHEMATICA
s=Sum[(-1)^n/((n^2 + n + 1)!), {n, 0, Infinity}]; First[RealDigits[N[s, 100]]]
CROSSREFS
KEYWORD
nonn,cons
AUTHOR
Clark Kimberling, Apr 04 2024
STATUS
approved