The number of solutions to phi(x) = phi(x+1) below 10^n, where phi(x) is the Euler totient function.
A300285
The number of solutions to phi(x) = phi(x+1) below 10^n, where phi(x) is the Euler totient function.
Terms
- a(0) =2a(1) =3a(2) =10a(3) =17a(4) =36a(5) =68a(6) =142a(7) =306a(8) =651a(9) =1267a(10) =2567a(11) =5236a(12) =10755a(13) =20388a(14) =42999
External references
- oeis: A300285