Denominators of the partial alternating sums of the reciprocals of the sum of unitary divisors function (A034448).
A379516
Denominators of the partial alternating sums of the reciprocals of the sum of unitary divisors function (A034448).
Terms
- a(0) =1a(1) =3a(2) =12a(3) =60a(4) =60a(5) =5a(6) =40a(7) =360a(8) =360a(9) =120a(10) =120a(11) =120a(12) =840a(13) =140a(14) =840a(15) =14280a(16) =42840a(17) =42840a(18) =42840a(19) =8568a(20) =34272a(21) =34272a(22) =34272a(23) =11424a(24) =148512a(25) =49504a(26) =7072a(27) =35360a(28) =106080a(29) =318240
External references
- oeis: A379516