From db3831401f309d6a8f8c5f424dde7b6a402a168e Mon Sep 17 00:00:00 2001
From: Vodimed <67785939+anna-vodimed@users.noreply.github.com>
Date: Sun, 4 Jul 2021 13:53:20 +0000
Subject: [PATCH] Add solution for Project-Euler Problem15

---
 Project-Euler/Problem015.js | 13 +++++++++++++
 1 file changed, 13 insertions(+)
 create mode 100644 Project-Euler/Problem015.js

diff --git a/Project-Euler/Problem015.js b/Project-Euler/Problem015.js
new file mode 100644
index 000000000..f33a48b79
--- /dev/null
+++ b/Project-Euler/Problem015.js
@@ -0,0 +1,13 @@
+// https://projecteuler.net/problem=15
+/* Starting in the top left corner of a 2×2 grid, and only being able to move to
+the right and down, there are exactly 6 routes to the bottom right corner.
+How many such routes are there through a 20×20 grid?
+*/
+
+const latticePath = n => {
+
+    for (var i = 1, c = 1; i <= n; i++)
+        c = c * (n + i) / i;
+    return c;
+}
+console.log(latticePath(20));