Display a views attachment on first page only

See https://www.drupal.org/node/794982#comment-4308854

First, create an argument for your attachment. Make it Global:Null Select Provide default argument for the “Action to take if argument is not present” Add a word of plain text into the Default argument input box, pick whatever word you want Under validator options, select PHP code. Put the following code in the PHP validate code textarea:

return ! isset($_GET[‘page’]);