[seqfan] Is this possible?

Hans Havermann pxp at rogers.com
Sat Jun 5 17:35:16 CEST 2010


Quadruples {a,b,c,d}, a>b>c>d>0, where
a+b, a+c, a+d, b+c, b+d, c+d are all squares,
a+b+c, a+b+d, a+c+d, b+c+d are all cubes, and
a+b+c+d is a fourth power.




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