๐ข๐{}
๐ฅ๏ธโ๏ธ๐โ๏ธ๐ฅ๏ธ
๐โ๏ธ๐โ๏ธ๐
๐ฅ|๐ฉ|๐ฆ
๐ง|๐ฆ|๐ฉ
๐[โ โก๏ธโกโก๏ธโข]
#stirling numbers #combinatorics #partitions #permutations #james stirling