Numbers m such that m divides A173290(m) = Sum_{k=1..m} psi(k), where psi is the Dedekind psi function (A001615).

A309272

Numbers m such that m divides A173290(m) = Sum_{k=1..m} psi(k), where psi is the Dedekind psi function (A001615).

Terms

    a(0) =1a(1) =2a(2) =5a(3) =15a(4) =31a(5) =40a(6) =66a(7) =81a(8) =315a(9) =966a(10) =1398a(11) =1768a(12) =30166a(13) =32335a(14) =98734a(15) =388033a(16) =591597a(17) =1375056a(18) =14966304a(19) =15160528a(20) =50793208a(21) =51302236a(22) =99253376a(23) =110994356a(24) =230465053a(25) =402340268a(26) =497982399a(27) =2027319577a(28) =2879855394a(29) =18450762682

External references