Number of powers of 7 between 2^n and 2^(n+1).

Terms

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