Name for this sorting algorithm

This algorithm is essentially counting sort

https://en.m.wikipedia.org/wiki/Counting_sort?fbclid=IwAR1XKmg3EuxUBqJOfTm4HTo8YuOXgP_ZDHy6qIBDR_4cTUqr70DTeT9wiRw

This algorithm can be computed in a single step when there is a diagonal symmetry in the Ferrer diagram

E.g permutations of 5,3,2,1,1

Or permutations of 4,3,2,1