Not that most of you haven't seen this in your history playing but it might refresh your memories as to various studies on "clumping" v. "segments" (sequencing/shuffle tracking)

http://web.archive.org/web/200412060...q/clumping.htm

And a noted author, on board here: https://www.blackjacktheforum.com/en...-Bryce-Carlson

And of course, Norm: http://www.blackjack-scams.com/html/card_clumping.html