As far as I can make out, there is no formula available to calculate the number of free n-polyominoes, only bounds. Can you please confirm whether this is the case. If there is a formula, could you please point me to it. If there is not, is the problem just unsolved or has it been shown in some way to be insoluble?(adsbygoogle = window.adsbygoogle || []).push({});

At first sight, it looks as if it ought to be a simple formula to find, so if one cannot be found, is it possible to identify the reason why?

Thanks in anticipation.

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# Calculate the number of free n-polyominoes

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