Numbers n such that sigma(phi(n)) = sigma(n) - phi(n).

Terms

a(0) =172a(1) =248a(2) =765a(3) =4712a(4) =8924a(5) =16898a(6) =28552a(7) =50692a(8) =99302a(9) =229845a(10) =279490a(11) =280456a(12) =292995a(13) =300430a(14) =323488a(15) =334990a(16) =338990a(17) =346318a(18) =376790a(19) =403790a(20) =521738a(21) =548504a(22) =617918a(23) =1445824a(24) =1625806a(25) =2642596a(26) =2967724a(27) =3935764a(28) =7878836a(29) =8751946