Barometer | 28 December 2012
Counting the years 2013 might look an uninteresting number for a year but it is in fact a mathematical rarity: a year whose digits, when rearranged, can form a simple arithmetic progression: i.e. 0,1,2,3. — The last such year was 1432. The next will be 2031, after which we will have to wait until 2103