1 files changed, 5 insertions, 0 deletions
diff --git a/progs/a525.py b/progs/a525.py
new file mode 100644
index 0000000..06cd0a5
--- /dev/null
+++ b/progs/a525.py
@@ -0,0 +1,5 @@
+def sum_series(n):
+  if n < 1:
+    return 0
+  else:
+    return n + sum_series(n - 2)
+\ No newline at end of file