## Six Nine Twenty-Seven

What is N?

6, 9, 27, 54, **N**, 2241

675.

The next number in the sequence is n squared minus m or f(n,m) = n^{2} – m

f(6,9) = 6^{2} – 9 = 27

f(9,27) = 9^{2} – 27 = 54

f(27,54) = 27^{2} – 54 = *675*

f(54,*675*) = 54^{2} – 675 = 2241

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