Monotonic ordering of nonnegative differences 4^i-6^j, for 40>= i>=0, j>=0.

Terms

a(0) =0a(1) =3a(2) =10a(3) =15a(4) =28a(5) =40a(6) =58a(7) =63a(8) =220a(9) =250a(10) =255a(11) =808a(12) =988a(13) =1018a(14) =1023a(15) =2800a(16) =3880a(17) =4060a(18) =4090a(19) =4095a(20) =8608a(21) =15088a(22) =16168a(23) =16348a(24) =16378a(25) =16383a(26) =18880a(27) =57760a(28) =64240a(29) =65320