Number of k <= P(n) such that rad(k) | P(n), where rad(n) = A007947(n) and P(n) = A002110(n).

A363061

Number of k <= P(n) such that rad(k) | P(n), where rad(n) = A007947(n) and P(n) = A002110(n).

Terms

    a(0) =1a(1) =2a(2) =5a(3) =18a(4) =68a(5) =283a(6) =1161a(7) =4843a(8) =19985a(9) =83074a(10) =349670a(11) =1456458a(12) =6107257a(13) =25547835a(14) =106115655a(15) =440396113a(16) =1833079809a(17) =7642924612a(18) =31705433101a(19) =131711607956a(20) =546283729493

External references