Approximation of Euler number e

Approximation of Euler number e The Euler number e can be approximated as follows:

e_ap(n)= 1/0! + 1/1! + 1/2! + 1/3! +⋯+ 1/n!

The approximation error is the smaller, the higher n is.

Q: Enter e_ap(13) as a number with 13 valid digits! Do not enter leading or trailing zeros or blanks.

[Avinash]

Where is the answer?

[Walter Roberson]

2.718281828459

Note: the leading "2" counts as a valid digit.

Answer 1

[Walter Roberson]

Okay, done.