Monotonic ordering of nonnegative differences 3^i-6^j, for 40>= i>=0, j>=0.

Terms

a(0) =0a(1) =2a(2) =3a(3) =8a(4) =21a(5) =26a(6) =27a(7) =45a(8) =75a(9) =80a(10) =207a(11) =237a(12) =242a(13) =513a(14) =693a(15) =723a(16) =728a(17) =891a(18) =1971a(19) =2151a(20) =2181a(21) =2186a(22) =5265a(23) =6345a(24) =6525a(25) =6555a(26) =6560a(27) =11907a(28) =12393a(29) =18387