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 A192114 #6 Oct 21 2019 14:28:15
%S A192114 0,1,3,7,11,15,27,31,39,59,63,103,123,127,131,231,251,255,387,399,487,
%T A192114 507,511,759,899,971,999,1019,1023,1423,1923,2023,2043,2047,3471,3971,
%U A192114 4071,4091,4095,5067,7567,8067,8167,8187,8191,13259,15759,16259,16359
%N A192114 Monotonic ordering of nonnegative differences 2^i-5^j, for 40>=i>=0, j>=0.
%t A192114 c = 2; d = 5; t[i_, j_] := c^i - d^j;
%t A192114 u = Table[t[i, j], {i, 0, 40}, {j, 0, i*Log[d, c]}];
%t A192114 v = Union[Flatten[u ]]
%Y A192114 Cf. A192115.
%K A192114 nonn
%O A192114 1,3
%A A192114 _Clark Kimberling_, Jun 23 2011