using System;

using System.Linq;

using System.Collections.Generic;

​

public class Program

{

    public static void Main()

    {

        IList<int> array = Enumerable.Range(1, 42).ToList();

        int step = 6;

        int digitsCount = 10;

        var selectedDigits = new int[digitsCount];

        int index = 1;

        int length = array.Count();

        for(int d = 0; d < digitsCount; d++)

        {

            int selectedDigit = array[index % length];

            while(selectedDigits.Contains(selectedDigit)){

                index++;

                selectedDigit = array[index % length];

            }

            selectedDigits[d] = selectedDigit;

            index +=step;

        }

        foreach(var d in selectedDigits)

        Console.WriteLine(d);

    }

}