OK, now you've set aside that problem, here's another: http://en.wikipedia.org/wiki/Golomb_ruler http://en.wikipedia.org/wiki/Golomb_ruler Quite similar in its

OK, now you've set aside that problem, here's another: http://en.wikipedia.org/wiki/Golomb_ruler http://en.wikipedia.org/wiki/Golomb_ruler Quite similar in its maddening simplicity.