Denominators of the partial alternating sums of the reciprocals of Pillai's arithmetical function (A018804).

A379366

Denominators of the partial alternating sums of the reciprocals of Pillai's arithmetical function (A018804).

Terms

    a(0) =1a(1) =3a(2) =15a(3) =120a(4) =360a(5) =360a(6) =4680a(7) =936a(8) =6552a(9) =19656a(10) =19656a(11) =12285a(12) =61425a(13) =61425a(14) =61425a(15) =982800a(16) =10810800a(17) =10810800a(18) =399999600a(19) =399999600a(20) =30769200a(21) =30769200a(22) =30769200a(23) =30769200a(24) =399999600a(25) =79999920a(26) =239999760a(27) =239999760a(28) =4559995440a(29) =911999088

External references