Denominators of the partial alternating sums of the reciprocals of the sum of divisors function (A000203).
A357846
Denominators of the partial alternating sums of the reciprocals of the sum of divisors function (A000203).
Terms
- a(0) =1a(1) =3a(2) =12a(3) =84a(4) =84a(5) =7a(6) =56a(7) =840a(8) =10920a(9) =32760a(10) =32760a(11) =32760a(12) =32760a(13) =16380a(14) =32760a(15) =1015560a(16) =338520a(17) =338520a(18) =338520a(19) =338520a(20) =1354080a(21) =4062240a(22) =4062240a(23) =4062240a(24) =131040a(25) =131040a(26) =131040a(27) =131040a(28) =131040a(29) =43680
External references
- oeis: A357846