Squares that can be expressed as the sum of two positive squares but not as the sum of three positive squares.
A309779
Squares that can be expressed as the sum of two positive squares but not as the sum of three positive squares.
Terms
- a(0) =25a(1) =100a(2) =400a(3) =1600a(4) =6400a(5) =25600a(6) =102400a(7) =409600a(8) =1638400a(9) =6553600a(10) =26214400a(11) =104857600a(12) =419430400a(13) =1677721600a(14) =6710886400a(15) =26843545600a(16) =107374182400a(17) =429496729600
External references
- oeis: A309779