Orchid XP v8 wrote:
> As you really ought to know, a domino is a tile with two numbers printed 
> on it. Aside from the fact that people try balancing them and then 
> knocking them over, you can play various games that involve arranging 
> dominos end-to-end such that adjacent ends have identical numbers. But 
> given a limited number of dominos, there is presumably only a certain 
> number of ways of doing this.
> 
> Now it really sounds like there ought to be a mathematical theory 
> underlying this idea. But I have no clue what it's called...

It falls somewhere within number theory.

Regards,
John

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