Monotonic ordering of nonnegative differences 2^i-10^j, for 40>= i>=0, j>=0.

Terms

a(0) =0a(1) =1a(2) =3a(3) =6a(4) =7a(5) =15a(6) =22a(7) =24a(8) =28a(9) =31a(10) =54a(11) =63a(12) =118a(13) =127a(14) =156a(15) =246a(16) =255a(17) =412a(18) =502a(19) =511a(20) =924a(21) =1014a(22) =1023a(23) =1048a(24) =1948a(25) =2038a(26) =2047a(27) =3096a(28) =3996a(29) =4086