{{alias}}( n )
    Computes the nth non-Fibonacci number.

    If not provided a nonnegative integer value, the function returns `NaN`.

    If provided `NaN`, the function returns `NaN`.

    Parameters
    ----------
    n: integer
        Input value.

    Returns
    -------
    y: number
        Non-Fibonacci number.

    Examples
    --------
    > var v = {{alias}}( 1 )
    4
    > v = {{alias}}( 2 )
    6
    > v = {{alias}}( 3 )
    7
    > v = {{alias}}( NaN )
    NaN

    See Also
    --------