diff --git a/code_study/Baekjoon/python/2921.py b/code_study/Baekjoon/python/2921.py
new file mode 100644
index 0000000..a83238a
--- /dev/null
+++ b/code_study/Baekjoon/python/2921.py
@@ -0,0 +1,10 @@
+N = int(input())
+
+sigma = lambda k : int(0.5*k*(k+1))
+
+ans = 0
+for n in range(1,N+1) :
+    if n==1 : ans = 3
+    else : ans += sigma(n) + n*(n+1)
+
+print(ans)
\ No newline at end of file