Numbers k for which A065330(k) = A065330(sigma(k)).

Terms

a(0) =1a(1) =2a(2) =3a(3) =6a(4) =28a(5) =40a(6) =84a(7) =120a(8) =135a(9) =224a(10) =270a(11) =496a(12) =672a(13) =819a(14) =1488a(15) =1638a(16) =3780a(17) =8128a(18) =10880a(19) =24384a(20) =30240a(21) =32640a(22) =32760a(23) =66960a(24) =167400a(25) =174592a(26) =406224a(27) =523776a(28) =1097280a(29) =2178540