Digits of powers of 7.

Terms

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