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 A363999 #11 Aug 02 2023 11:49:35 %S A363999 1,5,7,11,13,17,19,23,25,29,37,47,49,55,61,65,73,77,79,101,115,119, %T A363999 125,139,175,179,211,217,227,229,235,239,241,247,253,269,295,431,473, %U A363999 485,503,509,601,665,697,713,721,725,727,781,943,997,1015,1021,1163 %N A363999 Numbers of the form |2^i - 3^j|, for i >= 1, j >= 1. %Y A363999 Cf. A014121, A363998, A364000, A364001. %K A363999 nonn %O A363999 1,2 %A A363999 _Clark Kimberling_, Jul 30 2023