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 A192198 #7 Oct 21 2019 15:09:02 %S A192198 0,3,7,39,59,63,387,487,507,511,971,3471,3971,4071,4091,4095,17143, %T A192198 29643,32143,32643,32743,32763,32767,144027,184019,246519,259019, %U A192198 261519,262019,262119,262139,262143,1706527,2019027,2081527,2094027,2096527,2097027,2097127 %N A192198 Monotonic ordering of nonnegative differences 8^i-5^j, for 40>= i>=0, j>=0. %t A192198 c = 8; d = 5; t[i_, j_] := c^i - d^j; %t A192198 u = Table[t[i, j], {i, 0, 40}, {j, 0, i*Log[d, c]}]; %t A192198 v = Union[Flatten[u ]] %Y A192198 Cf. A192197. %K A192198 nonn %O A192198 1,2 %A A192198 _Clark Kimberling_, Jun 25 2011