6-342-30-2-132 / 420-72-30 / 12-240-20-30 / 420-240 / 342-30-506-30-2-156 / 2 / 42-2-182-240-462-380 / 272-72-342-2-380-30 / 2-210-20 / 90-420-380 / 2-462-420-72-240-342:

420-240 / 6-30 / 240-342 / 210-240-420 / 420-240 / 6-30; 420-72-2-420 / 90-380 / 420-72-30 / 306-462-30-380-420-90-240-210.

~552-90-156-156-90-2-182 / 380-72-2-132-30-380-272-30-2-342-30

Note: Each letter of every word is separated by a dash and each word is separated by a slash.

(In reply to re(2): 72-4-182-156-30-420 (correction) by drew)

One objective should be to find a simple way to decode. That encoding is via x^2+x was revealed way back in an earlier comment. On a calculator, it is easy to encode using x(x+1), but decoding is even simpler if you use the integer part of the square root of the coded letter as I have suggested.

Posted by Richard on 2003-11-22 14:51:20