It won't work correctly for n greater than 10. :-)
ans-7*(ans>10) would fix that.
You are right, you could use ind2sub to avoid some of the limitations of dec2base as well (e.g. for n>36)...
Back to basics 1 - Saving
Find best domino orientation
Find the maximum number of decimal places in a set of numbers
Set some matrix elements to zero
The Matrix Construction
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