diff --git a/utopian_tree/test.in b/utopian_tree/test.in
new file mode 100644
index 0000000..b84706e
--- /dev/null
+++ b/utopian_tree/test.in
@@ -0,0 +1,5 @@
+4
+1
+2
+3
+4
\ No newline at end of file
diff --git a/utopian_tree/utopian_tree.py b/utopian_tree/utopian_tree.py
new file mode 100644
index 0000000..28729fa
--- /dev/null
+++ b/utopian_tree/utopian_tree.py
@@ -0,0 +1,16 @@
+#!/usr/bin/python3
+
+import sys
+
+def calcsize(cycles):
+	tmp = 2**((cycles+3)//2)
+	if cycles % 2 == 1:
+		return tmp - 2
+	return tmp - 1
+
+def main():
+	total = int(sys.stdin.readline())
+	for i in range(total):
+		print(calcsize(int(sys.stdin.readline())))
+
+main()
\ No newline at end of file