Project Euler Forum

Just reporting a typo: in the problem, S(n) is defined as sum_{i=1}^n f(n). I believe it should be sum_{i=1}^n f(i).

jpaulson wrote:Just reporting a typo: in the problem, S(n) is defined as sum_{i=1}^n f(n). I believe it should be sum_{i=1}^n f(i).

Fixed. Thank you.

Please confirm if the following results are correct ?

S(2^10) = 349526
S(2^20) = 503875926
S(2^30) = 202282326
S(2^40) = 391568726
S(2^60) = 426789653

Hi i'm getting exactly the same result as you except for 2^60, in that case the my last 9 digits are:

517409622

So yeah it would be nice if somebody could confirm this values...

mirzauzairbaig wrote:Please confirm if the following results are correct ?

S(2^10) = 349526
S(2^20) = 503875926
S(2^30) = 202282326
S(2^40) = 391568726
S(2^60) = 426789653

The_Ash wrote:Hi i'm getting exactly the same result as you except for 2^60, in that case the my last 9 digits are:

517409622

So yeah it would be nice if somebody could confirm this values...

Both S(2⁶⁰) = ...426789653 and S(2⁶⁰) = ...517409622 are incorrect.

What about 426781526 (for S(2⁶⁰)?)

h_anand wrote: Wed Aug 12, 2015 9:33 pm What about 426781526 (for S(2⁶⁰)?)

That one appears to be correct.