you should probably add an assert statement that checks the size of the output matrices
I second @bmtran. lu wins!
thanks, I added the extra asserts as you suggest. the other solutions submitted so far look interesting, thanks for them!
it's lu, again...
very interesting observation that lu returns binary values factors for
these inputs. i must think about this further!
Return the 3n+1 sequence for n
Back to basics 17 - white space
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