Unitary barely 3-deficient numbers: numbers m such that usigma(k)/k < usigma(m)/m < 3 for all numbers k < m, where usigma is the sum of unitary divisors function (A034448).
A336672
Unitary barely 3-deficient numbers: numbers m such that usigma(k)/k < usigma(m)/m < 3 for all numbers k < m, where usigma is the sum of unitary divisors function (A034448).
Terms
- a(0) =1a(1) =2a(2) =6a(3) =30a(4) =210a(5) =2310a(6) =110670a(7) =182910a(8) =898590a(9) =22851570a(10) =26266170a(11) =45255210a(12) =64124970a(13) =265402410a(14) =1374105810a(15) =1631268870
External references
- oeis: A336672