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 A192156 #6 Oct 21 2019 14:51:06
%S A192156 0,5,7,37,55,61,63,269,431,485,503,509,511,1909,3367,3853,4015,4069,
%T A192156 4087,4093,4095,13085,26207,30581,32039,32525,32687,32741,32759,32765,
%U A192156 32767,84997,203095,242461,255583,259957,261415,261901,262063,262117,262135,262141
%N A192156 Monotonic ordering of nonnegative differences 8^i-3^j, for 40>= i>=0, j>=0.
%t A192156 c = 8; d = 3; t[i_, j_] := c^i - d^j;
%t A192156 u = Table[t[i, j], {i, 0, 40}, {j, 0, i*Log[d, c]}];
%t A192156 v = Union[Flatten[u ]]
%Y A192156 Cf. A192155.
%K A192156 nonn
%O A192156 1,2
%A A192156 _Clark Kimberling_, Jun 24 2011