diff --git a/solutions/python/268B.py b/solutions/python/268B.py
new file mode 100644
index 0000000..32b6591
--- /dev/null
+++ b/solutions/python/268B.py
@@ -0,0 +1,3 @@
+n = int(input())
+
+print(round((n-1)*n*(n+1)/6+n))