Numbers k such that k divides lcm(tau(k), sigma(k)).

Terms

a(0) =1a(1) =2a(2) =6a(3) =12a(4) =24a(5) =28a(6) =40a(7) =84a(8) =120a(9) =252a(10) =360a(11) =496a(12) =672a(13) =2480a(14) =3276a(15) =4680a(16) =7440a(17) =8128a(18) =30240a(19) =32760a(20) =56896a(21) =293760a(22) =435708a(23) =523776a(24) =997920a(25) =2178540a(26) =2618880a(27) =8910720a(28) =23569920a(29) =33550336