
    Design an algorithm to determine the correlation pattern at a specific monitoring interval n in a patient's vital sign sequence, where each value represents the relationship between consecutive health measurements from wearable devices. The sequence follows a recursive pattern where each new value is determined by counting the frequency of the previous value's occurrence in the preceding measurements, helping identify potential health anomalies. The first two values in the sequence are 1, and subsequent values follow the pattern where the nth value equals the sum of the values at positions a(a(n-1)) and a(n-a(n-1)).
    

    
def sequence(n):
    """
    Design an algorithm to determine the correlation pattern at a specific monitoring interval n in a patient's vital sign sequence, where each value represents the relationship between consecutive health measurements from wearable devices. The sequence follows a recursive pattern where each new value is determined by counting the frequency of the previous value's occurrence in the preceding measurements, helping identify potential health anomalies. The first two values in the sequence are 1, and subsequent values follow the pattern where the nth value equals the sum of the values at positions a(a(n-1)) and a(n-a(n-1)).
    

    """
def sequence(n):
    """
    Design an algorithm to determine the correlation pattern at a specific monitoring interval n in a patient's vital sign sequence, where each value represents the relationship between consecutive health measurements from wearable devices. The sequence follows a recursive pattern where each new value is determined by counting the frequency of the previous value's occurrence in the preceding measurements, helping identify potential health anomalies. The first two values in the sequence are 1, and subsequent values follow the pattern where the nth value equals the sum of the values at positions a(a(n-1)) and a(n-a(n-1)).
    

    """
    if n == 1 or n == 2:
        return 1
    else:
        return sequence(sequence(n - 1)) + sequence(n - sequence(n - 1))