Solutions to phi(gpf(x)) - gpf(phi(x)) = 14 = c are special multiples of 17, x = 17k, where greatest prime factors of factor k were observed from {2, 3, 5}, i.e., it is smaller than 17. See solutions to other even cases of c (=A070813): A007283 for 0, A070004 for 2, A070815 for 254, A070816 for 65534. Gpf = greatest prime factor.
A070814
Solutions to phi(gpf(x)) - gpf(phi(x)) = 14 = c are special multiples of 17, x = 17k, where greatest prime factors of factor k were observed from {2, 3, 5}, i.e., it is smaller than 17. See solutions to other even cases of c (=A070813): A007283 for 0, A070004 for 2, A070815 for 254, A070816 for 65534. Gpf = greatest prime factor.
Terms
- a(0) =17a(1) =34a(2) =51a(3) =68a(4) =85a(5) =102a(6) =136a(7) =170a(8) =204a(9) =255a(10) =272a(11) =340a(12) =408a(13) =510a(14) =544a(15) =680a(16) =816a(17) =1020a(18) =1088a(19) =1360a(20) =1632a(21) =2040a(22) =2176a(23) =2720a(24) =3264a(25) =4080a(26) =4352a(27) =5440a(28) =6528a(29) =8160
External references
- oeis: A070814