<?xml version="1.0"?>
<div><span class="kw">theorem </span><span class="lab"><font color="Green" title="E50">Th74</font></span>: <a NAME="T74"><span class="comment"><font color="firebrick">:: NUMPOLY1:74</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">n</font> being   non  <a href="ordinal1.html#V8" title="ORDINAL1:attr.8">zero</a>  <a href="ordinal1.html#NM6" title="ORDINAL1:NM.6">Nat</a>  st <font color="Olive" title="b1">n</font> is  <a href="abian.html#V1" title="ABIAN:attr.1">even</a>  &amp; <font color="Olive" title="b1">n</font> is  <a href="nat_5.html#V2" title="NAT_5:attr.2">perfect</a>  holds <br/><font color="Olive" title="b1">n</font> is  <a href="numpoly1.html#V1" title="NUMPOLY1:attr.1">triangular</a> </div></div>
