nth-child being ignored by the browser in bootstrap panels

I have <%= render @inspirations %>, which renders 4 inspirations:

VIEW CODE

<div class="panel panel-default">
  <div class="panel-body">
    <%= link_to inspiration_path(inspiration) do %>
      <%= inspiration.name %>
    <% end %>
  </div>
</div>

But I want to remove the border:white on the left side for odd number and on the right side for even number inspirations (this way the panels touch the edges of the screen).

What I have right now for nth-child is being ignored by the browser

CODE

.home-panels a:nth-child(odd) .panel-default {
  border-left: 0px !important;
}
.home-panels a:nth-child(even) .panel-default {
  border-right: 0px !important;
}
.home-panels {} .panel-default {
  border: 2.5px white solid;
}
.panel-body {}

<div class="home-panels">
  <div class="panel panel-default">
    <div class="panel-body">
      <a href="/inspirations/37-testing-to-see-border">
        <div class="white-link">Testing to See Border</div>
      </a>
    </div>
  </div>
  <div class="panel panel-default">
    <div class="panel-body">
      <a href="/inspirations/36-testing-words">
        <div class="white-link">Testing Words</div>
      </a>
    </div>
  </div>
  <div class="panel panel-default">
    <a href="/inspirations/35">
      <img class="testing-image" alt="This is a Goal-Setter &amp; Bucket List Maker" src="/system/inspirations/images/000/000/035/original/IMG_5106.JPG?1466979374">
    </a>
  </div>
  <div class="panel panel-default">
    <a href="/inspirations/34">
      <img class="testing-image" alt="This is a Goal-Setter &amp; Bucket List Maker" src="/system/inspirations/images/000/000/034/original/IMG_5073.JPG?1466810578">
    </a>
  </div>