\text{out}_{i} = \exp(-|x|) * i1(x) =
        \exp(-|x|) * \frac{(\text{input}_{i})}{2} * \sum_{k=0}^{\infty} \frac{(\text{input}_{i}^2/4)^k}{(k!) * (k+1)!}

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Args:
    {input}

Keyword args:
    {out}

Example::
    >>> torch.special.i1e(torch.arange(5, dtype=torch.float32))
    tensor([0.0000, 0.2079, 0.2153, 0.1968, 0.1788])
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