Posted by **Henley** on Tuesday, June 23, 2009 at 1:15pm.

Diagram # # of squares Pattern for

1 1 Cal.# unit sq.

1^2+0^2

2 5 2^+1^2

3 13 3^2+2^2

4 ? ?

10 ? ?

? 421 ?

Just need to know how to come up with the pattern?

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