---
id: 5900f44b1000cf542c50ff5e
challengeType: 5
title: 'Problem 223: Almost right-angled triangles I'
videoUrl: ''
localeTitle: 问题223：几乎是直角三角形I.
---

## Description
<section id="description">如果边满足a2 + b2 = c2 + 1，让我们称一个整数边三角形，边a≤b≤c几乎不是锐角。 <p>有多少个几乎没有锐角的三角形，周长≤25,000,000？ </p></section>

## Instructions
<section id="instructions">
</section>

## Tests
<section id='tests'>

```yml
tests:
  - text: <code>euler223()</code>应该返回61614848。
    testString: 'assert.strictEqual(euler223(), 61614848, "<code>euler223()</code> should return 61614848.");'

```

</section>

## Challenge Seed
<section id='challengeSeed'>

<div id='js-seed'>

```js
function euler223() {
  // Good luck!
  return true;
}

euler223();

```

</div>



</section>

## Solution
<section id='solution'>

```js
// solution required
```
</section>