Print integers in any base up to 36
Befunge, 17x4 = 68 characters

1-&amp;00p&amp;&gt;:!#v_:00v
v-10&lt;  ^/g00\%g &lt;
&lt; &gt;:^@_.# #$v#:!`
"_^#`9::$  &lt;&lt;,+"W


Online interpreter: http://www.bedroomlan.org/tools/befunge-93-playground

First input is base, second is number.

Similar to other solutions here this does not output anything when the number is 0.  I may look at fixing this at some point.