So, I think that once I've calculated the total number of legal arrangements, I divide by 720 to determine the number of patterns?

A 3x3 with 4 symbols has 95,340178,068 solutions, a number that's not even divisible by 4!. This is because some solutions don't use all the available symbols.

In reply to Re^4: Pattern enumeration. (KISS) by ikegami
in thread Pattern enumeration. by BrowserUk

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