Denominators of the partial alternating sums of the reciprocals of the sum of bi-unitary divisors function (A188999).
A379618
Denominators of the partial alternating sums of the reciprocals of the sum of bi-unitary divisors function (A188999).
Terms
- a(0) =1a(1) =3a(2) =12a(3) =60a(4) =60a(5) =5a(6) =40a(7) =120a(8) =24a(9) =72a(10) =72a(11) =360a(12) =2520a(13) =1260a(14) =2520a(15) =7560a(16) =7560a(17) =1512a(18) =7560a(19) =7560a(20) =30240a(21) =30240a(22) =30240a(23) =6048a(24) =78624a(25) =78624a(26) =393120a(27) =78624a(28) =393120a(29) =393120
External references
- oeis: A379618