Denominators of the partial alternating sums of the reciprocals of the Dedekind psi function (A001615).

A357821

Denominators of the partial alternating sums of the reciprocals of the Dedekind psi function (A001615).

Terms

    a(0) =1a(1) =3a(2) =12a(3) =4a(4) =12a(5) =6a(6) =24a(7) =8a(8) =24a(9) =72a(10) =72a(11) =18a(12) =63a(13) =504a(14) =63a(15) =504a(16) =168a(17) =504a(18) =2520a(19) =2520a(20) =10080a(21) =1120a(22) =3360a(23) =3360a(24) =672a(25) =224a(26) =2016a(27) =2016a(28) =10080a(29) =10080

External references