First and second posts only
<?php
//* Do NOT include the opening php tag shown above. Copy the code shown below.
add_action( 'genesis_after_entry', 'google_ad' );
function google_ad() {
if ( ! ( is_home() || is_category() ) )
return;
global $wp_query;
if( ($wp_query->current_post == 0) || ($wp_query->current_post == 1) ) {
echo '<div class="adsense">Adsense code here</div>';
}
}