Monotonic ordering of nonnegative differences 8^i-5^j, for 40>= i>=0, j>=0.

Terms

a(0) =0a(1) =3a(2) =7a(3) =39a(4) =59a(5) =63a(6) =387a(7) =487a(8) =507a(9) =511a(10) =971a(11) =3471a(12) =3971a(13) =4071a(14) =4091a(15) =4095a(16) =17143a(17) =29643a(18) =32143a(19) =32643a(20) =32743a(21) =32763a(22) =32767a(23) =144027a(24) =184019a(25) =246519a(26) =259019a(27) =261519a(28) =262019a(29) =262119