[r-t] Easter Challenge

Alexander Holroyd holroyd at math.ubc.ca
Mon Apr 13 21:26:29 UTC 2009


> I'm still not sure how this differs from what I said before. To phrase a 
> related question, is it possible to generate an extent of doubles with just 
> three changes (eg 1, 5 and 145?) If not, why not?

Of course:

120 original doubles
s=4 for 1
1 4 5
-----
s s s
s
s s s
s
s s
s
-----
2 part




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