From 86e90cdac5f1a699ea3e02b83ab1eb0b5c27a57e Mon Sep 17 00:00:00 2001
From: github-actions <${GITHUB_ACTOR}@users.noreply.github.com>
Date: Sun, 13 Sep 2020 04:18:21 +0000
Subject: [PATCH] updating DIRECTORY.md

---
 DIRECTORY.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/DIRECTORY.md b/DIRECTORY.md
index e9c51452..430940f5 100644
--- a/DIRECTORY.md
+++ b/DIRECTORY.md
@@ -151,6 +151,7 @@
   * [PrimeCheck](https://github.com/TheAlgorithms/Java/blob/master/Maths/PrimeCheck.java)
   * [PrimeFactorization](https://github.com/TheAlgorithms/Java/blob/master/Maths/PrimeFactorization.java)
   * [PythagoreanTriple](https://github.com/TheAlgorithms/Java/blob/master/Maths/PythagoreanTriple.java)
+  * [SumOfArithmeticSeries](https://github.com/TheAlgorithms/Java/blob/master/Maths/SumOfArithmeticSeries.java)
   * [SumOfDigits](https://github.com/TheAlgorithms/Java/blob/master/Maths/SumOfDigits.java)
   * [VampireNumber](https://github.com/TheAlgorithms/Java/blob/master/Maths/VampireNumber.java)