This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A192170 #6 Oct 21 2019 19:19:17
%S A192170 0,5,8,17,65,77,80,473,665,713,725,728,2465,5537,6305,6497,6545,6557,
%T A192170 6560,42665,54953,58025,58793,58985,59033,59045,59048,269297,465905,
%U A192170 515057,527345,530417,531185,531377,531425,531437,531440,588665,3734393,4520825
%N A192170 Monotonic ordering of nonnegative differences 9^i-4^j, for 40>= i>=0, j>=0.
%t A192170 c = 9; d = 4; t[i_, j_] := c^i - d^j;
%t A192170 u = Table[t[i, j], {i, 0, 40}, {j, 0, i*Log[d, c]}];
%t A192170 v = Union[Flatten[u ]]
%Y A192170 Cf. A192169.
%K A192170 nonn
%O A192170 1,2
%A A192170 _Clark Kimberling_, Jun 24 2011