matlab nchoosek command


I have N vectors which look like this:

[1?m] [m+1?2m] [2m+1?3m] [3m+1?4m] [4m+1?5m]..... [{(N-1)m}+1?Nm]

I want to select 1 element from each vector without duplication of any combinations.

Essentially only when all combinations are done with 1st element in first vector ,only then it should move to next element in first vector
say i have [123] [456] [789]

my combinations should be like 147, 148 ,149, 157 ,158 ,159 ,167, 168, 169, 247
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