2 files changed, 65 insertions, 0 deletions
diff --git a/challenge-173/roger-bell-west/python/ch-1.py b/challenge-173/roger-bell-west/python/ch-1.py
new file mode 100755
index 0000000000..3ee4659182
--- /dev/null
+++ b/challenge-173/roger-bell-west/python/ch-1.py
@@ -0,0 +1,38 @@
+#! /usr/bin/python3
+
+import unittest
+
+def esthetic(n0, base):
+  n = n0
+  pdigit = 0
+  ch = False
+  while n > 0:
+    digit = n % base
+    if ch and abs(digit - pdigit) != 1:
+      return False
+    ch = True
+    pdigit = digit
+    n //= base
+  return True
+
+def esthetic10(n):
+  return esthetic(n, 10)
+
+class TestEsthetic(unittest.TestCase):
+
+        def test_ex1(self):
+          self.assertEqual(esthetic10(5456),True,'example 1')
+
+        def test_ex2(self):
+          self.assertEqual(esthetic10(120),False,'example 1')
+
+        def test_ex3(self):
+          self.assertEqual(esthetic10(12),True,'example 1')
+
+        def test_ex4(self):
+          self.assertEqual(esthetic10(5654),True,'example 1')
+
+        def test_ex5(self):
+          self.assertEqual(esthetic10(890),False,'example 1')
+
+unittest.main()
diff --git a/challenge-173/roger-bell-west/python/ch-2.py b/challenge-173/roger-bell-west/python/ch-2.py
new file mode 100755
index 0000000000..08e12ca80e
--- /dev/null
+++ b/challenge-173/roger-bell-west/python/ch-2.py
@@ -0,0 +1,27 @@
+#! /usr/bin/python3
+
+import unittest
+
+def sylvester(ct):
+  o = [ 2 ]
+  for i in range(2,ct+1):
+    o.append(1 + (o[-1] * (o[-1] - 1)))
+  return o
+
+class TestSylvester(unittest.TestCase):
+
+        def test_ex1(self):
+          self.assertEqual(sylvester(10),[
+            2,
+            3,
+            7,
+            43,
+            1807,
+            3263443,
+            10650056950807,
+            113423713055421844361000443,
+            12864938683278671740537145998360961546653259485195807,
+            165506647324519964198468195444439180017513152706377497841851388766535868639572406808911988131737645185443
+          ],'example 1')
+
+unittest.main()