Here's an actually self-referential variant that does include its magic number: http://jtra.cz/stuff/essays/math-self-reference/index.html http://jtra.cz/stuff/

Here's an actually self-referential variant that does include its magic number: http://jtra.cz/stuff/essays/math-self-reference/index.html http://jtra.cz/stuff/essays/math-self-reference/index.html