Link: http://www.papermoneyforum.com/post/how-rare-are-fancy-serial-numbers-8250627?pid=1293496129 Seven-in-A-Row Dave U says: See the link: http://www.coolserialnumbers.com/FancySerialNumbers.aspx Seven-In-A-Row - In a seven-in-a-row serial number, seven consecutive digits are all the same. Seven-Of-A-Kind - In a seven-of-a-kind serial number, seven digits are all the same:
