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

Terms

a(0) =0a(1) =4a(2) =7a(3) =48a(4) =60a(5) =63a(6) =256a(7) =448a(8) =496a(9) =508a(10) =511a(11) =3072a(12) =3840a(13) =4032a(14) =4080a(15) =4092a(16) =4095a(17) =16384a(18) =28672a(19) =31744a(20) =32512a(21) =32704a(22) =32752a(23) =32764a(24) =32767a(25) =196608a(26) =245760a(27) =258048a(28) =261120a(29) =261888