A272932 - OEIS

%I #8 May 17 2016 09:29:14

%S 892,1375,7555

%N a(n) = smallest magic sum of any 5 X 5 magic square composed of n-gonal numbers.

%H Christian Boyer, <a href="http://www.multimagie.com/English/SquaresOfSquares4_7.htm">First known 4x4 to 7x7 magic squares of squares</a>

%H Christian Boyer, <a href="http://www.multimagie.com/SmallestTriangularExpanded.pdf">Smallest magic squares of triangular numbers</a>

%H <a href="/index/Mag#magic">Index entries for sequences related to magic squares</a>

%Y Cf. A271712.

%K nonn,bref,more

%O 3,1

%A _Arkadiusz Wesolowski_, May 11 2016

%E a(4) was found in 2004 by Christian Boyer

%E a(5) was found in 2007 by Lee Morgenstern