Numbers n such that phi(n) = phi(n+10), with Euler's totient function phi = A000010.

Terms

a(0) =20a(1) =26a(2) =35a(3) =100a(4) =130a(5) =160a(6) =370a(7) =400a(8) =610a(9) =730a(10) =793a(11) =1000a(12) =1570a(13) =1843a(14) =1930a(15) =2500a(16) =2560a(17) =2770a(18) =2860a(19) =3130a(20) =3970a(21) =4000a(22) =4171a(23) =4210a(24) =4570a(25) =5410a(26) =5767a(27) =6130a(28) =6400a(29) =6610