This is tkrec, a combination of scheme, PostScript, perl, and tcl[Tk] code that can be fun and useful (or something).
Here's an example portion of concentric circles, each corresponding to the
highest power of 5 that divides the Stirling number of the second kind which
corresponds to that place.
The interface is kind of a Monty the Amazing Weatherman, but it's all pretty straightforward:
Here, we're all set to view rows 22-80 of the Eulerian numbers, in landscape mode, and each place will show the highest power of 3 which divides the Eulerian number which would be in that place. A PostScript file called "foo" will be created when you click on `Calc,' and `Preview' will run ghostview on whatever happens to be in "foo." `Print' follows in the same way.
There is a whole slew of ways you can view things, just try it out.
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