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---
id: 5900f49d1000cf542c50ffaf
challengeType: 5
title: 'Problem 304: Primonacci'
videoUrl: ''
localeTitle: 问题304Primonacci
---
## Description
<section id="description">
对于任何正整数n函数next_primen返回最小质数p使得p> n。
序列an定义为
对于n> 1a1= next_prime1014和an= next_primean-1
斐波那契数列fn定义为
对于n> 1f0= 0f1= 1和fn= fn-1+ fn-2
序列bn定义为fan
求出∑bn为1≤n≤100000。
给出答案mod 1234567891011。
</section>
## Instructions
<section id="instructions">
</section>
## Tests
<section id='tests'>
```yml
tests:
- text: <code>euler304()</code>应该返回283988410192。
testString: assert.strictEqual(euler304(), 283988410192);
```
</section>
## Challenge Seed
<section id='challengeSeed'>
<div id='js-seed'>
```js
function euler304() {
// Good luck!
return true;
}
euler304();
```
</div>
</section>
## Solution
<section id='solution'>
```js
// solution required
```
</section>