Numbers k such that sigma(k) == 0 (mod k-4).

Terms

a(0) =3a(1) =5a(2) =6a(3) =10a(4) =22a(5) =24a(6) =60a(7) =130a(8) =184a(9) =1012a(10) =2272a(11) =18904a(12) =33664a(13) =70564a(14) =85936a(15) =100804a(16) =391612a(17) =527872a(18) =1090912a(19) =17619844a(20) =2147713024a(21) =6800695312a(22) =34360655872a(23) =549759483904