Widget On Front Page Only front-page.php

// See if we're on the blog post home page and if there are posts
if ( is_home() && have_posts()) {
// Get what page we are on, if not assume first page.
	$paged = (get_query_var('paged')) ? get_query_var('paged') : 1;
	if( 1 == $paged ) {
	    add_action('genesis_before_loop','bw_paged_widget');
	}

}