Integers k such that for some m >= 0, psi(k) = rad(k)^m, where psi(k) = A001615(k) and rad(k) = A007947(k).

A356420

Integers k such that for some m >= 0, psi(k) = rad(k)^m, where psi(k) = A001615(k) and rad(k) = A007947(k).

Terms

    a(0) =1a(1) =18a(2) =108a(3) =648a(4) =3888a(5) =11250a(6) =23328a(7) =139968a(8) =337500a(9) =501126a(10) =839808a(11) =5038848a(12) =8696754a(13) =10125000a(14) =30233088a(15) =51114852a(16) =57177414a(17) =181398528a(18) =303750000a(19) =573985764a(20) =1088391168a(21) =2401451388a(22) =5018345916a(23) =5213714904a(24) =6530347008a(25) =9112500000a(26) =23981814018a(27) =26622318750a(28) =37883060424

External references