<?xml version="1.0"?>
<div><span class="kw">theorem </span><span class="lab"><font color="Green" title="E53">Th76</font></span>: <a NAME="T76"><span class="comment"><font color="firebrick">:: NUMPOLY1:76</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>  st <font color="Olive" title="b1">n</font> is  <a href="numpoly1.html#V1" title="NUMPOLY1:attr.1">triangular</a>  holds <br/><span class="p1">(<span class="default">8 <a href="xcmplx_0.html#K3" title="XCMPLX_0:func.3">*</a> <font color="Olive" title="b1">n</font></span>)</span> <a href="xcmplx_0.html#K2" title="XCMPLX_0:func.2">+</a> 1 is  <a href="pythtrip.html#V1" title="PYTHTRIP:attr.1">square</a> </div></div>
