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.
Triangle Numbers Below N
Golomb's self-describing sequence (based on Euler 341)
Create an index-powered vector
Generalised Hamming Number
"Find out the best cricket"
Highest powers in factorials
Pandigital Multiples of 11 (based on Project Euler 491)
How Far Can You Throw Something?
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