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 A293648 #13 Feb 06 2018 13:02:51 %S A293648 91,217,721,1027,1729,3367,4706,4921,4977,7657,8587,8911,9919,10621, %T A293648 14911,15561,16263,20683,21014,23877,25669,27937,28063,31519,35929, %U A293648 39331,40033,49959,63693,68705,68857,68913,73017,77653,77779,97309,98623,106597,109573 %N A293648 Sum of two (possibly negative) coprime cubes in at least 2 ways, but not the sum of 2 noncoprime cubes. %C A293648 Not every term is cubefree; some are sb^3 where s is in A159843 and b > 1. %H A293648 Rosalie Fay, <a href="/A293648/b293648.txt">Table of n, a(n) for n = 1..325</a> %e A293648 63693 = 34^3 + 29^3 = 53^3 - 44^3 and 34 & 29 are coprime, as are 53 & -44, but it is not also the sum of cubes of 2 noncoprime integers, so 63693 is in the sequence. %Y A293648 Cf. A293647 (allows noncoprime); A293649 (only positives); A293646, A293651 %K A293648 nonn %O A293648 1,1 %A A293648 _Rosalie Fay_, Oct 16 2017