Numbers k such that sopfr(k)=tau(k).

Terms

a(0) =2a(1) =60a(2) =72a(3) =168a(4) =270a(5) =450a(6) =560a(7) =990a(8) =1056a(9) =1188a(10) =1470a(11) =2496a(12) =3200a(13) =3402a(14) =3520a(15) =3672a(16) =4788a(17) =5700a(18) =8320a(19) =9856a(20) =9936a(21) =10164a(22) =10395a(23) =11000a(24) =11160a(25) =12180a(26) =12740a(27) =13056a(28) =13720a(29) =14616