The common value of sigma_2 for square-amicable numbers, sigma_2(m)=sigma_2(n), m<n.

Terms

a(0) =50a(1) =850a(2) =1300a(3) =2210a(4) =6100a(5) =8500a(6) =14500a(7) =18100a(8) =22100a(9) =22100a(10) =22100a(11) =24650a(12) =26500a(13) =32550a(14) =42500a(15) =42100a(16) =48100a(17) =48100a(18) =48100a(19) =68500a(20) =68900a(21) =84100a(22) =92500a(23) =103700a(24) =110500a(25) =110500a(26) =110500a(27) =140500a(28) =158600a(29) =174100