
    In a bank's fraud detection system, determine the number of possible ways that n consecutive credit card transactions can be arranged such that exactly m transactions show higher amounts than their subsequent transactions, helping identify unusual spending patterns. The system needs to analyze these permutations to establish baseline patterns for detecting anomalous transaction sequences.
    

    
def eulerian_num(n, m):
    """
    In a bank's fraud detection system, determine the number of possible ways that n consecutive credit card transactions can be arranged such that exactly m transactions show higher amounts than their subsequent transactions, helping identify unusual spending patterns. The system needs to analyze these permutations to establish baseline patterns for detecting anomalous transaction sequences.
    

    """
def eulerian_num(n, m):
    """
    In a bank's fraud detection system, determine the number of possible ways that n consecutive credit card transactions can be arranged such that exactly m transactions show higher amounts than their subsequent transactions, helping identify unusual spending patterns. The system needs to analyze these permutations to establish baseline patterns for detecting anomalous transaction sequences.
    

    """
    if m >= n or n == 0:
        return 0
    if m == 0:
        return 1
    return (n - m) * eulerian_num(n - 1, m - 1) + (m + 1) * eulerian_num(n - 1, m)