A polite number is an integer that sums of at least two consecutive positive integers.
For example 7 = 3+4 so 7 is a polite number.
Given N return N-th polite number.
See also 2595
As a heads up, http://oeis.org/A138591 counts 1 as a polite number, but the test suite does not.
Find the numeric mean of the prime numbers in a matrix.
Project Euler: Problem 2, Sum of even Fibonacci
Back to basics 10 - Max Float
Cell Counting: How Many Draws?
06 - Matrix Equations 1
expand intervals vol.3
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