User talk:156.213.118.204

April 2020
Welcome to Wikipedia. Thank you for reverting your recent experiment&#32;with the page Triangular number. Please take a look at the welcome page to learn more about contributing to our encyclopedia. If you would like to experiment further, please use the sandbox instead, as someone could see your edit before you revert it. Thank you. — Anita5192 (talk) 21:28, 27 April 2020 (UTC)
 * If this is a shared IP address, and you did not make the edits referred to above, consider creating an account for yourself or logging in with an existing account so that you can avoid further irrelevant notices.