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 A192116 #6 Oct 21 2019 14:29:00
%S A192116 0,1,2,3,7,10,15,26,28,31,40,58,63,92,122,127,220,250,255,296,416,476,
%T A192116 506,511,752,808,988,1018,1023,1832,2012,2042,2047,2800,3880,4060,
%U A192116 4090,4095,6896,7976,8156,8186,8191,8608,15088,16168,16348,16378,16383,18880
%N A192116 Monotonic ordering of nonnegative differences 2^i-6^j, for 40>=i>=0, j>=0.
%t A192116 c = 2; d = 6; t[i_, j_] := c^i - d^j;
%t A192116 u = Table[t[i, j], {i, 0, 40}, {j, 0, i*Log[d, c]}];
%t A192116 v = Union[Flatten[u ]]
%Y A192116 Cf. A192117.
%K A192116 nonn
%O A192116 1,3
%A A192116 _Clark Kimberling_, Jun 23 2011