» Sun Sep 12, 2010 9:50 am Actually, no. A 3x3 "hollow square" only needs 8 cubes. 4x4 needs 12, 5x5 needs 16, etc., so you need 4n-4 cubes for an n-sided hollow square.
[edit] Or at least, that's what it seems like...
[edit] Or at least, that's what it seems like...
doh, yeah that's right. However, assuming that he wants his pyramid to end with a single block on top, he can't use even numbers.
let me see if I got this right. With a 127x127 base he'd need 4*127-4 cubes for the base perimeter? So that's 504 cubes? :huh:
