(2^n)-th digit of infinite string 12345678910111213141516...

Terms

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