It's very sad that there is no matlab function "npermsk".
Not work for R is long, and k is small.
For example, R = 1:100, k = 2.
@li haitao, the max digital is 9. If length of R great than 10, it is another problem. I think you can submit a problem like this but larger R.
@ Binbin Qi, You're right.
Find the numeric mean of the prime numbers in a matrix.
Indexed Probability Table
Back to basics 9 - Indexed References
Find the largest value in the 3D matrix
Create an n-by-n null matrix and fill with ones certain positions
It's Happy! It's Fun! It's Happy Fun Hyperball!
Lowest sum from a group of digits
The cake is a lie...
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Exponents in Factorials
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