justinblayney on "checking if page is the wordpress default blog landing page"

Hello,
I am trying to test if a page is the default wordpress Blog landing page..

i created a page named blog and this is different than the home page. The $post->ID for blog is 13

usually i could test for $post->ID, but because it has blog articles, the post ID becomes the ID the the first article in the list instead of 13...

Also, i only want to check for this page, if it is a category, article, author,etc.. listing I do not want these pages.. i only want the initial page for the blog