If one of the chairs is designated as the "head" of the table, then the answer is n!. Any of n people sits at the head of the table, and the permutation proceeds in a clockwise direction.
Now, since the chairs are indistinguishable, it doesn't matter who sits at the head, so divide by n, giving (n-1)!.
Counting Items in a Glass Jar and Calculating Cubic Inches in a Glass Jar:
https://calculate-this.com/how-many-cubic-inches-jar-or-cylinder-calculator
https://www.bottlestore.com/glass-containers/glass-jars.html
https://sciencing.com/count-jelly-beans-jar-4913844.html