Monotonic ordering of nonnegative differences 4^i-8^j, for 40>= i>=0, j>=0.

Terms

a(0) =0a(1) =3a(2) =8a(3) =15a(4) =56a(5) =63a(6) =192a(7) =248a(8) =255a(9) =512a(10) =960a(11) =1016a(12) =1023a(13) =3584a(14) =4032a(15) =4088a(16) =4095a(17) =12288a(18) =15872a(19) =16320a(20) =16376a(21) =16383a(22) =32768a(23) =61440a(24) =65024a(25) =65472a(26) =65528a(27) =65535a(28) =229376a(29) =258048