---
id: 5900f4e51000cf542c50fff8
challengeType: 5
title: 'Problem 377: Sum of digits, experience 13'
forumTopicId: 302039
---
## Description
There are 16 positive integers that do not have a zero in their digits and that have a digital sum equal to 5, namely:
5, 14, 23, 32, 41, 113, 122, 131, 212, 221, 311, 1112, 1121, 1211, 2111 and 11111.
Their sum is 17891.
Let f(n) be the sum of all positive integers that do not have a zero in their digits and have a digital sum equal to n.
Find $\displaystyle \sum_{i=1}^{17} f(13^i)$.
Give the last 9 digits as your answer.
## Instructions
## Tests
```yml
tests:
- text: euler377() should return 732385277.
testString: assert.strictEqual(euler377(), 732385277);
```
## Challenge Seed
```js
function euler377() {
return true;
}
euler377();
```