OFFSET
1,2
LINKS
FORMULA
Equals Sum_{n>=2} 1/round(n!/e).
EXAMPLE
1.63822707450537064754289311415112266106359324964443616472326282872630582...
MATHEMATICA
a[n_]:=If[n>0, Round[n!/E], 1]; RealDigits[Sum[1/a[n], {n, 2, 500}], 10, 113][[1]](* Indranil Ghosh, Mar 12 2017 *)
PROG
(Derive)
PrecisionDigits ≔ 1000
NotationDigits ≔ 1000
sum(1/ROUND(n!/e), n, 2, 500)
CROSSREFS
KEYWORD
nonn,cons
AUTHOR
Miguel Alejandro Moreno Barrientos, Jan 26 2017
STATUS
approved