My solution.

src/main/java/Solution.java

@@ -1,16 +1,41 @@
 import java.util.*;
-import java.io.*;
-import java.math.*;
 
 class Solution {
 
-	public static void main( String[] args ) {
-		Scanner in = new Scanner( System.in );
-		// read values with in.next...() methods
+    public static void main(String[] args) {
+        Scanner in = new Scanner(System.in);
+        // read values with in.next...() methods
+        int iterations = in.nextInt();
+        // code your solution here
+        String sequence = getSequence(iterations, new StringBuilder("1"));
 
-		// code your solution here
+        // Write result with System.out.println()
+        System.out.println(sequence);
+    }
 
-		// Write result with System.out.println()
-		System.out.println( "value" );
-	}
+    private static String getSequence(int input, StringBuilder previousSequence) {
+        if (input == 0) {
+            return previousSequence.toString();
+        }
+
+        int counter = 0;
+        StringBuilder sequence = new StringBuilder();
+        char currentCharacter = previousSequence.charAt(0);
+
+        for (int i = 0; i < previousSequence.length(); i++) {
+            char character = previousSequence.charAt(i);
+            if (character != currentCharacter) {
+                sequence.append(counter) ; //first add the count
+                sequence.append(currentCharacter); //count follwed by the actual number
+                counter = 0;
+
+                currentCharacter = character;
+
+            }
+            counter++;
+        }
+        sequence.append(counter) ; //first add the count
+        sequence.append(currentCharacter); //count follwed by the actual number
+        return getSequence(input - 1, sequence);
+    }
 }