Denominators of the partial sums of the reciprocals of the alternating sum of divisors function (A206369).

A379620

Denominators of the partial sums of the reciprocals of the alternating sum of divisors function (A206369).

Terms

    a(0) =1a(1) =1a(2) =2a(3) =6a(4) =12a(5) =12a(6) =4a(7) =20a(8) =140a(9) =35a(10) =70a(11) =105a(12) =140a(13) =420a(14) =840a(15) =9240a(16) =18480a(17) =18480a(18) =55440a(19) =55440a(20) =55440a(21) =55440a(22) =55440a(23) =11088a(24) =1584a(25) =1584a(26) =7920a(27) =7920a(28) =55440a(29) =55440

External references