def decibinaryNumbers(x):
    def decibinary(n):        
        # create the equation and length according to the integer n
        long = int(math.log(n,2)+1)
        list_x = []
        for i in range(long):
            a = 2**i
            list_x.append(a)    # if n in (4:7)  - list_x=[4 2 1]
        list_x.reverse()        # if n in (8:15) - list_x=[8 4 2 1]
        # print(list_x)
        # create a dictionary with all the ranks of each element according to the length of the equation log(n,2)
        variables = {}
        for i in range(len(list_x)):
            key_var =  "range_"+str(i+1)
            value_var = list(range(0, int(n/list_x[i])+1))
            variables[key_var] = value_var
        #print(variables.items())
        list_prod = product(*variables.values())
        prod_values = list(list_prod)
        # print(prod_values)
        # create the variables according to the number of lists in the dict
        charact = []
        for pa in range(len(list_x)):
            charact.append(f"{chr(97+pa)}") 
        characters = ",".join(charact)
        #print(characters)
        
        if len(list_x) == 2: combinations = [(b, a) for b, a in prod_values if 2*b + a == n]
        if len(list_x) == 3: combinations = [(c, b, a) for c, b, a in prod_values if 4*c + 2*b + a == n]
        if len(list_x) == 4: combinations = [(d, c, b, a) for d, c, b, a in prod_values if 8*d + 4*c + 2*b + a == n]
        if len(list_x) == 5: combinations = [(e, d, c, b, a) for e, d, c, b, a in prod_values if 16*e + 8*d + 4*c + 2*b + a == n]
        if len(list_x) == 6: combinations = [(f, e, d, c, b, a) for f, e, d, c, b, a in prod_values if 32*f + 16*e + 8*d + 4*c + 2*b + a == n]
        if len(list_x) == 7: combinations = [(g, f, e, d, c, b, a) for g, f, e, d, c, b, a in prod_values if 64*g + 32*f + 16*e + 8*d + 4*c + 2*b + a == n]
        
        numeros = [int(''.join(map(str, t)).replace(',', '')) for t in combinations]
        #print(numeros) 
        return numeros   
    
    list_total = [0,1]
    m = 2  
    while len(list_total) < x:     
        list_total += decibinary(m)
        m += 1
    #print(list_total)
    return(list_total[x-1])