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

Terms

a(0) =0a(1) =4a(2) =17a(3) =24a(4) =61a(5) =113a(6) =117a(7) =124a(8) =561a(9) =617a(10) =624a(11) =2613a(12) =3061a(13) =3117a(14) =3124a(15) =11529a(16) =15113a(17) =15561a(18) =15617a(19) =15624a(20) =45357a(21) =74029a(22) =77613a(23) =78061a(24) =78117a(25) =78124a(26) =128481a(27) =357857a(28) =386529a(29) =390113