Monotonic ordering of nonnegative differences 9^i-3^j, for 40>= i>=0, j>=0.

Terms

a(0) =0a(1) =6a(2) =8a(3) =54a(4) =72a(5) =78a(6) =80a(7) =486a(8) =648a(9) =702a(10) =720a(11) =726a(12) =728a(13) =4374a(14) =5832a(15) =6318a(16) =6480a(17) =6534a(18) =6552a(19) =6558a(20) =6560a(21) =39366a(22) =52488a(23) =56862a(24) =58320a(25) =58806a(26) =58968a(27) =59022a(28) =59040a(29) =59046