Unitary totient superdeficient numbers: numbers n > 1 such that s(n)/n < s(m)/m for all m < n, where s is the sum of iterated uphi (A047994).

A291174

Unitary totient superdeficient numbers: numbers n > 1 such that s(n)/n < s(m)/m for all m < n, where s is the sum of iterated uphi (A047994).

Terms

    a(0) =2a(1) =3a(2) =6a(3) =12a(4) =14a(5) =26a(6) =30a(7) =42a(8) =186a(9) =210a(10) =2310a(11) =66990a(12) =903210a(13) =1037190a(14) =1138830

External references