Preliminary clan ranking on HW.

Damn, does anyone remember how progression is calculated (arithmetic or geometric)? I keep thinking about the decreasing (or conversely, increasing) coefficient for accounting for the player's place.
I believe that personal rating is one thing, and the rating a player brings to their clan is something else. If the first parameter consists of the sum of ratings of all clan members, then the second consists of the sum of ratings for places. Then calculate it with an oscillator. But here we must consider that the rating for places should have a decreasing (or increasing, depending on where you count from) coefficient. For example: Last place brings X points = rating by the first parameter. Penultimate place brings X+K points, where K is this coefficient. First place brings X+K, but here K is already different, as it is increasing. All that's left is to understand how it should grow. That's exactly where progression is needed. But can anyone tell me how it's calculated?