Periods of reciprocals of integers prime to 10.

Terms

a(0) =1a(1) =1a(2) =6a(3) =1a(4) =2a(5) =6a(6) =16a(7) =18a(8) =6a(9) =22a(10) =3a(11) =28a(12) =15a(13) =2a(14) =3a(15) =6a(16) =5a(17) =21a(18) =46a(19) =42a(20) =16a(21) =13a(22) =18a(23) =58a(24) =60a(25) =6a(26) =33a(27) =22a(28) =35a(29) =8