1 files changed, 2 insertions, 0 deletions
diff --git a/progs/a650.py b/progs/a650.py
new file mode 100644
index 0000000..4516aad
--- /dev/null
+++ b/progs/a650.py
@@ -0,0 +1,2 @@
+def square_Sum(n):  
+    return int(2*n*(n+1)*(2*n+1)/3)
+\ No newline at end of file