sum of (1! + 2! + .. + n!)

Enter a number 0 < n < 171
this function quickly use big resources to calc for n -> infinity, (for n = high numbers)

You can enter in math mode, ie. (4+2*3)/3
Insert a number: n > 0


n!

RESULT

sum_i=1_to_n [ i! ] ______ akkumulative sum of n! downto 1!

RESULT

sum_i=1_to_n [ i! * (n-i+1)] ______ this is, 1*n!+2*(n-1)!+..+n*1!

RESULT

sum_i=1_to_n [ i! * (n! / i!) ] ______ binomialthing calc, this is same as = n! * n

RESULT

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