Numbers k such that usigma(k) = round(zeta(2)/zeta(3)*k), where usigma(k) is the sum of unitary divisors of k (A034448).

A308045

Numbers k such that usigma(k) = round(zeta(2)/zeta(3)*k), where usigma(k) is the sum of unitary divisors of k (A034448).

Terms

    a(0) =1a(1) =2a(2) =3a(3) =4a(4) =35a(5) =44a(6) =111a(7) =123a(8) =1105a(9) =1900a(10) =2920a(11) =12452a(12) =17889a(13) =34200a(14) =65067a(15) =716148a(16) =14134055a(17) =179040201a(18) =221709100a(19) =221743300a(20) =221766100a(21) =221788900a(22) =1120968741a(23) =1272582040a(24) =1441454511a(25) =7339101375

External references