Add code

src/main.rs

@@ -0,0 +1,22 @@
+fn main() {
+    for base in 2..=64 {
+        println!("Basis {}: {:?}", base, solve(base));
+    }
+}
+
+fn solve(base: u128) -> Vec<u128> {
+    let digits: Vec<u128> = (0..base).collect();
+    let mut candidates = vec![(0, digits)];
+    for _ in 0..base {
+        candidates = candidates
+            .into_iter()
+            .flat_map(|(stumb, left)| left.clone().into_iter().map(move |digit| {
+                let mut next_left: Vec<u128> = left.clone();
+                next_left.retain(|d| *d != digit);
+                (stumb * base + digit, next_left)
+            }))
+            .filter(|(number, left)| number % (base - (left.len() as u128)) == 0)
+            .collect();
+    }
+    candidates.into_iter().map(|(number, _)| number).collect()
+}