Solutions to phi(gpf(x)) - gpf(phi(x)) = 254 = c are special multiples of 257, x = 257k, where largest prime factors of factor k were observed from {2, 3, 5, 17}. See solutions to other even cases of c (=A070813): A007283 for 0, A070004 for 2, A070814 for 14, A070816 for 65534.
A070815
Solutions to phi(gpf(x)) - gpf(phi(x)) = 254 = c are special multiples of 257, x = 257k, where largest prime factors of factor k were observed from {2, 3, 5, 17}. See solutions to other even cases of c (=A070813): A007283 for 0, A070004 for 2, A070814 for 14, A070816 for 65534.
Terms
- a(0) =257a(1) =514a(2) =771a(3) =1028a(4) =1285a(5) =1542a(6) =2056a(7) =2570a(8) =3084a(9) =3855a(10) =4112a(11) =4369a(12) =5140a(13) =6168a(14) =7710a(15) =8224a(16) =8738a(17) =10280a(18) =12336a(19) =13107a(20) =15420a(21) =16448a(22) =17476a(23) =20560a(24) =21845a(25) =24672a(26) =26214a(27) =30840a(28) =32896a(29) =34952
External references
- oeis: A070815