sample

using UnityEngine;
using System.Collections;
using System.Collections.Generic;
using System.Linq;

public class TesteA : MonoBehaviour {

    public List<ItemClass> List = new List<ItemClass>();
    public List<int> numbers = new List<int>();

    string VerificarNumeros () {

        for (int i = 0; i < List.Count; i++)
            if (List[i].nList.Intersect(numbers).ToList().Count == numbers.Count)
                return "sequencia encontrada no index " + i;

        return "sequencia não econtrada";
    }

    void Start() { print(VerificarNumeros()); }
}

[System.Serializable]
public class ItemClass
{
    public int Item;
    public string Date;
    public List<int> nList = new List<int>();
}