Monotonic ordering of nonnegative differences 9^i-4^j, for 40>= i>=0, j>=0.

Terms

a(0) =0a(1) =5a(2) =8a(3) =17a(4) =65a(5) =77a(6) =80a(7) =473a(8) =665a(9) =713a(10) =725a(11) =728a(12) =2465a(13) =5537a(14) =6305a(15) =6497a(16) =6545a(17) =6557a(18) =6560a(19) =42665a(20) =54953a(21) =58025a(22) =58793a(23) =58985a(24) =59033a(25) =59045a(26) =59048a(27) =269297a(28) =465905a(29) =515057