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<dt><u>Function:</u> <b>perms</b><i> &nbsp;<br>&nbsp;&nbsp;&nbsp;&nbsp;<tt>perms</tt> (<var>n</var>) &nbsp;<br>&nbsp;&nbsp;&nbsp;&nbsp;<tt>perms</tt> (<var>n</var>, <var>i</var>) &nbsp;<br>&nbsp;&nbsp;&nbsp;&nbsp;<tt>perms</tt> (<var>n</var>, <var>i</var>, <var>j</var>)</i>
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<dd><p><code>perms(<var>n</var>)</code> returns a list of all
<em>n</em>-degree permutations in the so-called Trotter-Johnson order.
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<p><code>perms(