Numbers k such that usigma(uphi(k)) = uphi(usigma(k)), where usigma is the sum of unitary divisors function (A034448) and uphi is the unitary totient function (A047994).

A329730

Numbers k such that usigma(uphi(k)) = uphi(usigma(k)), where usigma is the sum of unitary divisors function (A034448) and uphi is the unitary totient function (A047994).

Terms

    a(0) =1a(1) =3a(2) =4a(3) =8a(4) =12a(5) =24a(6) =33a(7) =91a(8) =132a(9) =201a(10) =728a(11) =812a(12) =921a(13) =1608a(14) =1612a(15) =2064a(16) =2496a(17) =2854a(18) =3058a(19) =3240a(20) =3435a(21) =3500a(22) =4426a(23) =5074a(24) =5664a(25) =5762a(26) =6860a(27) =7318a(28) =7368a(29) =8434

External references