Numbers m such that sigma(m)/esigma(m) > sigma(k)/esigma(k) for all k < m, where sigma(m) is the sum of divisors of m (A000203) and esigma(m) is the sum of exponential divisors of m (A051377).

A335396

Numbers m such that sigma(m)/esigma(m) > sigma(k)/esigma(k) for all k < m, where sigma(m) is the sum of divisors of m (A000203) and esigma(m) is the sum of exponential divisors of m (A051377).

Terms

    a(0) =1a(1) =2a(2) =6a(3) =30a(4) =96a(5) =210a(6) =480a(7) =1920a(8) =3360a(9) =13440a(10) =36960a(11) =147840a(12) =480480a(13) =1921920a(14) =8168160a(15) =11975040a(16) =32672640a(17) =155675520a(18) =620780160a(19) =1401079680a(20) =2490808320a(21) =2646483840

External references