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diff --git a/challenge-173/mohammad-anwar/python/ch-2.py b/challenge-173/mohammad-anwar/python/ch-2.py
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+#!/usr/bin/python3
+
+'''
+
+Week 173:
+
+    https://theweeklychallenge.org/blog/perl-weekly-challenge-173
+
+Task #2: Sylvester’s sequence
+
+    Write a script to generate first 10 members of Sylvester's sequence.
+
+'''
+
+import unittest
+
+def SylvesterSequence(n):
+    ss = [2]
+    for i in range (1, --n):
+        ss.append(1 + ss[-1] * (ss[-1] - 1))
+    return ss
+
+#
+#
+# Unit test class
+
+class TestSylvesterSequence(unittest.TestCase):
+
+    def test_example(self):
+        self.assertEqual(SylvesterSequence(10),
+        [
+          2
+         ,3
+         ,7
+         ,43
+         ,1807
+         ,3263443
+         ,10650056950807
+         ,113423713055421844361000443
+         ,12864938683278671740537145998360961546653259485195807
+         ,165506647324519964198468195444439180017513152706377497841851388766535868639572406808911988131737645185443
+       ])
+
+unittest.main()