Composite numbers k such that phi(k)*lambda(k) divides (k-1)^2, where phi(k) = A000010(k) and lambda(k) = A002322(k).

A277366

Composite numbers k such that phi(k)*lambda(k) divides (k-1)^2, where phi(k) = A000010(k) and lambda(k) = A002322(k).

Terms

    a(0) =1729a(1) =670033a(2) =6840001a(3) =83099521a(4) =193708801a(5) =321197185a(6) =367804801a(7) =484662529a(8) =1752710401a(9) =2320690177a(10) =5064928705a(11) =12820178449a(12) =32220147601a(13) =257124585601a(14) =270177600001a(15) =301036080385

External references