here's an obfuscated way to get powers of 3 from multiplying 1 by 2 and powers of two and two arrays (with a little addition in the mix). $a is what power of three to calculate. 
$a=24;@a=(1);sub d{push@a,map{2*$_}@a};
d for('1'.."$a");$b=$#a;$_=0;
push@b,$_+=$a[$#a-$b--] until($b==-1);
print$b[2**$a-1];

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a simple note, it'll use 2*(2**$a) array elements, and is probably O(2**n) in memory usage and cpu time, so its probably one of the more ineffecient ways to calculate powers of three in existence

In reply to Powers of three by simcop2387

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