Monotonic ordering of nonnegative differences 2^i - 8^j, for 40 >=i >= 0, j >= 0.

Terms

a(0) =0a(1) =1a(2) =3a(3) =7a(4) =8a(5) =15a(6) =24a(7) =31a(8) =56a(9) =63a(10) =64a(11) =120a(12) =127a(13) =192a(14) =248a(15) =255a(16) =448a(17) =504a(18) =511a(19) =512a(20) =960a(21) =1016a(22) =1023a(23) =1536a(24) =1984a(25) =2040a(26) =2047a(27) =3584a(28) =4032a(29) =4088