post query problem (first three posts different layout)

Maybe someone can help me. For my blog page I want the first three articles to have a different layout and ALL following look equally.

This is how I made it:

<article id="post-<?php the_ID(); ?>" <?php post_class(); ?>>

         <?php //query_posts($query_string . '&cat=-17'); ?>
         <?php //query_posts(array('category__not_in' => array(17))); ?>
         <?php $paged = ( get_query_var( 'paged' ) ) ? get_query_var( 'paged' ) : 1;

$args = array(
	'posts_per_page' => 5,
	'category__not_in' => array( 17 ),
	'paged' => $paged,
);

$the_query = new WP_Query( $args );
?>
			<?php if (have_posts()) : ?>
			<?php $count = 0; ?>
			<?php while (have_posts()) : the_post(); ?>
			<?php $count++; ?>

			<?php if ($count <= 3) : /* First three featured.*/ ?>      

				<?php
								/* Include the Post-Format-specific template for the content.
								 */
								get_template_part('startentry', get_post_format());
							?>

<!-- End featured. -->

		<?php else : ?>

					<?php
								/* all other articles
								 */
								get_template_part('entry', get_post_format());
							?>

			<?php endif; ?>

<?php endwhile; ?>
			<?php endif; ?>

<!-- End other. -->
<nav id="pagenav"><?php
$big = 999999999; // need an unlikely integer

echo paginate_links( array(
	'base' => str_replace( $big, '%#%', esc_url( get_pagenum_link( $big ) ) ),
	'format' => '?paged=%#%',
	'current' => max( 1, get_query_var('paged') ),
	'total' => $the_query->max_num_pages
) );
?>
</nav>
</article><!-- #post-## -->

Also I have the pagination function. But now I have the problem that every page has this layout with the first three posts in different style? And also excluding the category doesen’t work.

Maybe someone can help me?