1/n has period 4 in base 10.

Terms

a(0) =101a(1) =202a(2) =303a(3) =404a(4) =505a(5) =606a(6) =808a(7) =909a(8) =1010a(9) =1111a(10) =1212a(11) =1515a(12) =1616a(13) =1818a(14) =2020a(15) =2222a(16) =2424a(17) =2525a(18) =3030a(19) =3232a(20) =3333a(21) =3636a(22) =4040a(23) =4444a(24) =4545a(25) =4848a(26) =5050a(27) =5555a(28) =6060a(29) =6464