Numbers k such that lambda(k)^3 divides (k-1)^2, where lambda(k) = A002322(k).

A277389

Numbers k such that lambda(k)^3 divides (k-1)^2, where lambda(k) = A002322(k).

Terms

    a(0) =1a(1) =2a(2) =1729a(3) =19683001a(4) =367804801a(5) =631071001a(6) =2064236401a(7) =2320690177a(8) =24899816449a(9) =40017045601a(10) =110592000001a(11) =137299665601a(12) =432081216001a(13) =479534887801a(14) =760355883001

External references