Maybe you should specify the required precision in the problem description.
OK, I added a sentence, thanks.
different matlab fnction used to solve this problem
lol ! need a translator for this solution!
This solution should provide minimal rounding error since it's done in an essentially symbolic domain and then evaluated at the very end, but it doesn't satisfy the test cases. *sigh*
The sequence is strictly positive. (Not easy to see, but true). If your pn's get negative at some higher n, you still have the roundoff problem. It would be indeed avoided if the integer calculation within the loop was exact, but the numbers quickly become larger than the 48bit mantissa of a double.
Project Euler: Problem 1, Multiples of 3 and 5
Project Euler: Problem 9, Pythagorean numbers
Project Euler: Problem 16, Sums of Digits of Powers of Two
count to vector
Back to basics 17 - white space
linear least squares fitting
This is a palindrome and so am I
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