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 A192124 #6 Oct 21 2019 14:40:52
%S A192124 0,1,3,6,7,15,22,24,28,31,54,63,118,127,156,246,255,412,502,511,924,
%T A192124 1014,1023,1048,1948,2038,2047,3096,3996,4086,4095,6384,7192,8092,
%U A192124 8182,8191,15384,16284,16374,16383,22768,31072,31768,32668,32758,32767,48576
%N A192124 Monotonic ordering of nonnegative differences 2^i-10^j, for 40>= i>=0, j>=0.
%t A192124 c = 2; d = 10; t[i_, j_] := c^i - d^j;
%t A192124 u = Table[t[i, j], {i, 0, 40}, {j, 0, i*Log[d, c]}];
%t A192124 v = Union[Flatten[u ]]
%Y A192124 Cf. A192125.
%K A192124 nonn
%O A192124 1,3
%A A192124 _Clark Kimberling_, Jun 23 2011