the number of ways to fold a strip of stamps
... that the number of ways to fold a strip of stamps is always divisible by the number of stamps in the strip?
... that <b id="mwIw"><a href="./Map_folding" id="mwJA" rel="mw:WikiLink" title="Map folding">the number of ways to fold a strip of stamps</a></b> is always <a class="mw-redirect" href="./Divisible" id="mwJQ" rel="mw:WikiLink" title="Divisible">divisible</a> by the number of stamps in the strip?