a(n) is the least number such that phi(a(n)) = phi(R(a(n)))/n, where R(n) is the digit reverse of n and phi(n) is the Euler totient function of n.
A284497
a(n) is the least number such that phi(a(n)) = phi(R(a(n)))/n, where R(n) is the digit reverse of n and phi(n) is the Euler totient function of n.
Terms
- a(0) =1a(1) =37a(2) =12a(3) =15a(4) =199a(5) =189a(6) =124a(7) =1004a(8) =18a(9) =168a(10) =126a(11) =12048a(12) =10426a(13) =1358a(14) =11638a(15) =1078a(16) =1011868a(17) =112518a(18) =108018288a(19) =1076768a(20) =1012998
External references
- oeis: A284497