Totient superdeficient numbers: numbers n > 1 such that s(n)/n < s(m)/m for all m < n, where s(n) is the sum of iterated phi(n) (A092693).
A291173
Totient superdeficient numbers: numbers n > 1 such that s(n)/n < s(m)/m for all m < n, where s(n) is the sum of iterated phi(n) (A092693).
Terms
- a(0) =2a(1) =42a(2) =90a(3) =210a(4) =630a(5) =1050a(6) =1470a(7) =2310a(8) =6930a(9) =16170a(10) =30030a(11) =90090a(12) =150150a(13) =210210a(14) =570570a(15) =690690a(16) =870870a(17) =2072070a(18) =3573570a(19) =3993990a(20) =4834830
External references
- oeis: A291173