Hi everyone,<BR><BR>Let's say I have 4 numbers: 1234.<BR><BR>I wish to find out all possible permutations of this 4 numbers. I believe there is a total of 12 permutations.<BR><BR>I couldnt figure out ...
Summary The Eulerian numbers count permutations according to the number of descents. The two-sided Eulerian numbers count permutations according to number of descents and the number of descents in the ...
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