Number x such that usigma(x) = (-1)sigma(x), where usigma(x) is the sum of unitary divisors of x (A034448) and (-1)sigma(x) is defined in A049060 .

A258101

Number x such that usigma(x) = (-1)sigma(x), where usigma(x) is the sum of unitary divisors of x (A034448) and (-1)sigma(x) is defined in A049060 .

Terms

    a(0) =1a(1) =4a(2) =15867a(3) =21357a(4) =49887a(5) =63468a(6) =69875a(7) =85428a(8) =86387a(9) =149875a(10) =199548a(11) =247475a(12) =271607a(13) =279500a(14) =293944a(15) =318681a(16) =345548a(17) =599500a(18) =637659a(19) =989900a(20) =1086428a(21) =1169091a(22) =1274724a(23) =1897875a(24) =1913571a(25) =2550636a(26) =2665269a(27) =2801880a(28) =2855691

External references