diff --git a/LeetCode/1137_N_th_Tribonacci_Number.py b/LeetCode/1137_N_th_Tribonacci_Number.py
new file mode 100644
index 0000000..8c01a86
--- /dev/null
+++ b/LeetCode/1137_N_th_Tribonacci_Number.py
@@ -0,0 +1,14 @@
+class Solution:
+    def tribonacci(self, n: int) -> int:
+        a, b, c = 0, 1, 1
+        if n == 0:
+            return 0
+        elif n == 1 or n == 2:
+            return 1
+        else:
+            for _ in range(n - 2):
+                temp = a + b + c
+                a = b
+                b = c
+                c = temp
+            return temp