Numbers n such that n = gcd(n^2, sigma(n^2)).

Terms

a(0) =1a(1) =39a(2) =793a(3) =7137a(4) =76921a(5) =863577a(6) =2076867a(7) =4317885a(8) =8329831a(9) =23402223a(10) =53695813a(11) =55871145a(12) =224905437a(13) =243762649a(14) =1449786951a(15) =2631094837a(16) =2781581517a(17) =3606816823a(18) =6105766123a(19) =6605555983a(20) =6838433189a(21) =8771312043a(22) =13907907585a(23) =35225161895a(24) =42580779709a(25) =56541691089