Numbers n such that sigma(2*phi(n)) = 2*sigma(n).

Terms

a(0) =2318a(1) =2806a(2) =5734a(3) =5937a(4) =7198a(5) =8097a(6) =10126a(7) =11295a(8) =11818a(9) =13054a(10) =17324a(11) =20374a(12) =21838a(13) =22947a(14) =27694a(15) =29145a(16) =32086a(17) =33826a(18) =35074a(19) =38997a(20) =42334a(21) =42458a(22) =43798a(23) =46726a(24) =54825a(25) =56974a(26) =58438a(27) =61366a(28) =66202a(29) =68686