<?xml version="1.0"?>
<div><span class="kw">theorem </span><span class="lab"><font color="Green" title="E11">Th13</font></span>: <a NAME="T13"><span class="comment"><font color="firebrick">:: CATALAN1:13</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">n</font> being   <a href="ordinal1.html#NM6" title="ORDINAL1:NM.6">Nat</a> holds   <a href="catalan1.html#K1" title="CATALAN1:func.1">Catalan</a> <font color="Olive" title="b1">n</font> is   <a href="int_1.html#NM1" title="INT_1:NM.1">Integer</a></div></div>
