dynamic sequential number on different pages

hi, i want to create a pdf document with 50 pages, and 2 "dynamic number" on each page. So, for example, first page will have numbers "1" and "2", second page will have numbers "3" and "4", and so on... the question is how can i create "dynamic numbers" to increment in a sequencial order all other numbers. So, for example, if i want to change on page 1, the number "1" to "15", all others will automatically update to "16", "17", "18",.... is it possible to achieve that?

thanks in advance!