Wonderful! I added it as a comment to http://oeis.org/A000796 On Fri, Dec 13, 2013 at 11:45 AM, James Buddenhagen <jbuddenh@gmail.com>wrote:
That is truly magic!
On Fri, Dec 13, 2013 at 7:13 AM, Christian Boyer <cboyer@club-internet.fr> wrote:
In the latest update of www.multimagie.com, a new smallest known magic square of powers. A 144x144 magic square of 7th powers, constructed by Toshihiro Shirakawa. Magic sum = 3141592653589793238462643383279502884197169399375105. Amazing, all the digits of its magic sum are exactly the 52 first digits of Pi!
And a reminder. On smallest possible magic squares, there still remain ten enigmas for winning €6,900 (~$9,500) and ten bottles of champagne.
Christian.
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