Monotonic ordering of nonnegative differences 5^i-9^j, for 40>= i>=0, j>=0.

Terms

a(0) =0a(1) =4a(2) =16a(3) =24a(4) =44a(5) =116a(6) =124a(7) =544a(8) =616a(9) =624a(10) =2396a(11) =3044a(12) =3116a(13) =3124a(14) =9064a(15) =14896a(16) =15544a(17) =15616a(18) =15624a(19) =19076a(20) =71564a(21) =77396a(22) =78044a(23) =78116a(24) =78124a(25) =331576a(26) =384064a(27) =389896a(28) =390544a(29) =390616