diff --git a/src/serie_3.py b/src/serie_3.py
index 948e8e5..ffaee88 100644
--- a/src/serie_3.py
+++ b/src/serie_3.py
@@ -23,7 +23,7 @@ for punkt in punkte:
     x_0 = x_data[0]
     x_e = x_data[-1]
     N = 201
-    lw = 3
+    lw = 30
     fig = 1
 
     # Berechnung
@@ -31,5 +31,20 @@ for punkt in punkte:
     TAB = np.block([[y_data], [np.zeros((n-1, n))]])
     c_data = np.zeros(n)
     c_data[0] = y_data[0]
+    print(x_data)
+
+    print(TAB)
+
+    for i in range(1, n):
+        for j in range(1, n):
+            print(TAB[i][j-1])
+            print(TAB[i-1][j-1])
+            print(x_data[i])
+            print(x_data[i-1])
+            TAB[i][j] = (TAB[i][j-1]-TAB[i-1][j-1])/(x_data[i]-x_data[i-1])
+            break
+
+    print(TAB)
+    print()
 
 print("----------------------------------------------------------------")