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 A192149 #6 Oct 21 2019 14:48:11
%S A192149 0,2,4,8,22,26,56,76,80,104,118,218,238,242,604,704,724,728,1562,2062,
%T A192149 2162,2182,2186,3436,4058,5936,6436,6536,6556,6560,16558,19058,19558,
%U A192149 19658,19678,19682,43424,55924,58424,58924,59024,59044,59048,99022,140816
%N A192149 Monotonic ordering of nonnegative differences 3^i-5^j, for 40>= i>=0, j>=0.
%t A192149 c = 3; d = 5; t[i_, j_] := c^i - d^j;
%t A192149 u = Table[t[i, j], {i, 0, 40}, {j, 0, i*Log[d, c]}];
%t A192149 v = Union[Flatten[u ]]
%Y A192149 Cf. A192150.
%K A192149 nonn
%O A192149 1,2
%A A192149 _Clark Kimberling_, Jun 24 2011