freeCodeCamp/problem-136-singleton-difference.english.md at f1c9b08cf322e4268a0a31ae9b5d75bf3cfce7d1

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Oliver Eyton-Williams f1c9b08cf3 fix(curriculum): add isHidden: false to challenges

This includes certificates (where it does nothing), but does not
include any translations.

2020-05-25 16:25:19 +05:30

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id, challengeType, isHidden, title, forumTopicId

id	challengeType	isHidden	title	forumTopicId
5900f3f51000cf542c50ff07	5	false	Problem 136: Singleton difference	301764

Description

The positive integers, x, y, and z, are consecutive terms of an arithmetic progression. Given that n is a positive integer, the equation, x2 − y2 − z2 = n, has exactly one solution when n = 20: 132 − 102 − 72 = 20 In fact there are twenty-five values of n below one hundred for which the equation has a unique solution. How many values of n less than fifty million have exactly one solution?

Instructions

Tests

tests:
  - text: <code>euler136()</code> should return 2544559.
    testString: assert.strictEqual(euler136(), 2544559);

Challenge Seed

function euler136() {
  // Good luck!
  return true;
}

euler136();

Solution

// solution required

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