Numbers n such that sigma(n+sigma(n)) = 4*sigma(n).

Terms

a(0) =28a(1) =66a(2) =348a(3) =496a(4) =840a(5) =920a(6) =1320a(7) =1416a(8) =1602a(9) =1770a(10) =1896a(11) =1920a(12) =2040a(13) =2280a(14) =2556a(15) =3000a(16) =3360a(17) =3720a(18) =4440a(19) =4920a(20) =5456a(21) =5640a(22) =5826a(23) =7080a(24) =7392a(25) =8010a(26) =8040a(27) =8128a(28) =8298a(29) =10528