N = a^4 + 4*b^4 = c^4 + 4*d^4

 
 
a^4+4b^4 1
a^4+b^4 2

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

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About benvitalis

math grad - Interest: Number theory
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