Denominators of the partial sums of the reciprocals of the sum of unitary divisors function (A034448).
A379514
Denominators of the partial sums of the reciprocals of the sum of unitary divisors function (A034448).
Terms
- a(0) =1a(1) =3a(2) =12a(3) =60a(4) =20a(5) =30a(6) =120a(7) =360a(8) =360a(9) =40a(10) =120a(11) =120a(12) =840a(13) =70a(14) =840a(15) =14280a(16) =42840a(17) =42840a(18) =42840a(19) =42840a(20) =171360a(21) =57120a(22) =57120a(23) =171360a(24) =2227680a(25) =2227680a(26) =2227680a(27) =2227680a(28) =2227680a(29) =247520
External references
- oeis: A379514