1 files changed, 13 insertions, 0 deletions
diff --git a/progs/a869.py b/progs/a869.py
new file mode 100644
index 0000000..4c6a66f
--- /dev/null
+++ b/progs/a869.py
@@ -0,0 +1,13 @@
+def permutation_coefficient(n, k): 
+	P = [[0 for i in range(k + 1)] 
+			for j in range(n + 1)] 
+	for i in range(n + 1): 
+		for j in range(min(i, k) + 1): 
+			if (j == 0): 
+				P[i][j] = 1
+			else: 
+				P[i][j] = P[i - 1][j] + ( 
+						j * P[i - 1][j - 1]) 
+			if (j < k): 
+				P[i][j + 1] = 0
+	return P[n][k] 
+\ No newline at end of file