Composite numbers k such that phi(k) divides d*(k - 1) for some squarefree divisor d of k - 1.
A337316
Composite numbers k such that phi(k) divides d*(k - 1) for some squarefree divisor d of k - 1.
Terms
- a(0) =1729a(1) =12801a(2) =247105a(3) =1224721a(4) =2704801a(5) =5079361a(6) =8355841a(7) =26906881a(8) =30240001a(9) =34479361a(10) =36426241a(11) =45318561a(12) =48188161a(13) =49871361a(14) =61485601a(15) =107714881a(16) =170947105a(17) =178312321a(18) =193708801a(19) =393760321a(20) =446569201a(21) =475683841a(22) =740376001a(23) =781347841a(24) =878169601a(25) =987275521a(26) =1022304361
External references
- oeis: A337316