---
id: 5900f44b1000cf542c50ff5e
title: 'Problem 223: Almost right-angled triangles I'
challengeType: 5
forumTopicId: 301866
dashedName: problem-223-almost-right-angled-triangles-i
---

# --description--

Let us call an integer sided triangle with sides a ≤ b ≤ c barely acute if the sides satisfy a2 + b2 = c2 + 1.

How many barely acute triangles are there with perimeter ≤ 25,000,000?

# --hints--

`euler223()` should return 61614848.

```js
assert.strictEqual(euler223(), 61614848);
```

# --seed--

## --seed-contents--

```js
function euler223() {

  return true;
}

euler223();
```

# --solutions--

```js
// solution required
```
