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 A088017 #23 Feb 16 2025 08:32:51 %S A088017 6,14,16,21,27,29,32,34,42,46,51,58,59,62,66,69,70,75,77,78,84,85,86, %T A088017 88,90,93,96,102,103,110,111,114,115,123,125,130,133,137,140,144,149, %U A088017 157,158,160,162,165,166,173,176,178,179,181,182,183,187,194,201,202,203 %N A088017 Numbers not expressible as sum or difference of a nonzero cube and a nonzero square. %C A088017 Numbers n such that neither variant of Mordell's equation y^2=x^3+n (A054504) or y^2=x^3-n (A081121) has an integral solution with nonzero x and y. - _Jack Brennen_, Aug 28 2003 %H A088017 J. Gebel, <a href="/A001014/a001014.txt">Integer points on Mordell curves</a> [Cached copy, after the original web site tnt.math.se.tmu.ac.jp was shut down in 2017] %H A088017 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/MordellCurve.html">Mordell Curve</a>. %e A088017 16 is in the sequence because the only integral solution to Mordell's equation y^2 = x^3 +- 16 is (y=4,x=0). 49 is not in the sequence because it can also be expressed as 65^3-524^2. %Y A088017 Cf. A054504, A081121, A087285, A087286. %K A088017 nonn %O A088017 1,1 %A A088017 _Hugo Pfoertner_, Sep 18 2003