Numbers n for which n = phi(x)*phi(y), where n = x + y and phi(x) is the Euler totient function of x.

A273800

Numbers n for which n = phi(x)*phi(y), where n = x + y and phi(x) is the Euler totient function of x.

Terms

    a(0) =8a(1) =12a(2) =16a(3) =24a(4) =32a(5) =36a(6) =48a(7) =96a(8) =128a(9) =160a(10) =192a(11) =288a(12) =768a(13) =1152a(14) =2048a(15) =2560a(16) =3072a(17) =27648a(18) =110592a(19) =192704a(20) =196608a(21) =202496a(22) =232448a(23) =370688a(24) =379904a(25) =394264a(26) =443512a(27) =466048a(28) =508672a(29) =524288

External references