Numbers x such that there exist two integers 0<x<=y and z>0 such that sigma(x)^2 = sigma(y)^2 = x^2 + y^2 + z^2.
A385356
Numbers x such that there exist two integers 0<x<=y and z>0 such that sigma(x)^2 = sigma(y)^2 = x^2 + y^2 + z^2.
Terms
- a(0) =2a(1) =40a(2) =164a(3) =196a(4) =224a(5) =1120a(6) =3040a(7) =13440a(8) =22932a(9) =44200a(10) =76160a(11) =90848a(12) =91720a(13) =174592a(14) =530200a(15) =619840a(16) =687184a(17) =872960a(18) =1686400a(19) =1767040a(20) =1807120a(21) =1927680a(22) =1990912a(23) =2154880a(24) =3653760a(25) =4286880a(26) =5637632a(27) =5759680a(28) =6442128a(29) =8225280
External references
- oeis: A385356