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N. Makarova <a href="http://dxdy.ru/post242834.html#p242834">13x13 13 X 13 magic square</a>. (in Russian)
N. Makarova <a href="http://dxdy.ru/post245184.html#p245184">14x14 14 X 14 magic square</a>. (in Russian)
Dudeney gives 36095/11 for n = 11 (an obvious typo) and 4514 for n = 12.
a(3)-a(12) are confirmed/given by Chebrakov.
a(15), a(17), a(22), a(35), and a(124)=9912840 from S. Tognon (cf. A173079).
a(13)-a(14), a(16), a(18)-a(21), a(23)-a(34) from N. Makarova.
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Yu. V. Chebrakov , <a href="http://chebrakov.narod.ru/bbb-3.3.pdf">Theory of Section 3.3. Smallest magic matrices of prime numbers</a> in "Theory of Magic Matrices. Issue TMM-1.", 2008. (in Russian)
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Edited by _Max Alekseyev (maxale(AT)gmail.com), _, Feb 11 2010
_N. J. A. Sloane (njas(AT)research.att.com), _, Aug 27 2002
<a href="/Sindx_index/Mag.html#magic">Index entries for sequences related to magic squares</a>
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Until the early part of the twentieth century 1 was regarded as a prime (cf. see A008578).
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