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Jul 11, 2012 at 5:00 comment added Nik Weaver On second thought, a rational number less than $1/a_n^2$ in absolute value would be good enough ...
Jul 11, 2012 at 3:53 vote accept James Propp
Jul 11, 2012 at 2:11 history edited Nik Weaver CC BY-SA 3.0
added 9 characters in body; edited body
Jul 11, 2012 at 1:52 history answered Nik Weaver CC BY-SA 3.0