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 A207079 #21 Jul 09 2019 02:36:19 %S A207079 1,5,7,13,23 %N A207079 The only nonunique differences between powers of 3 and 2. %C A207079 The sequence is finite, this fact is a theorem in [Bennet2004]. %C A207079 1 = 3-2 = 3^2-2^3 = 2^2-3. %C A207079 5 = 3^2-2^2 = 2^3-3 = 2^5 - 3^3. %C A207079 7 = 2^4-3^2 = 3^2 - 2. %C A207079 13 = 2^4-3 = 2^8 - 3^5. %C A207079 23 = 3^3 - 2^2 = 2^5 - 3^2. %H A207079 M. A. Bennett, <a href="http://www.math.ubc.ca/~bennett/B-Pillai.pdf">Pillai's conjecture revisited</a>, J. Number Theory 98 (2003), 228-235. %H A207079 Douglas Edward Iannucci, <a href="https://arxiv.org/abs/1907.03347">On duplicate representations as 2^x+3^y for nonnegative integers x and y</a>, arXiv:1907.03347 [math.NT], 2019. Mentions this sequence. %F A207079 A219551(a(n)) > 1. - _Jonathan Sondow_, Dec 10 2012 %Y A207079 Cf. A053289, A074981, A076438, A219551. %K A207079 nonn,bref,fini,full %O A207079 1,2 %A A207079 _Gottfried Helms_, Feb 15 2012