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 A008917 #40 Aug 05 2021 15:28:50 %S A008917 251,1009,1366,1457,1459,1520,1730,1737,1756,1763,1793,1854,1945,2008, %T A008917 2072,2241,2414,2456,2458,2729,2736,3060,3391,3457,3592,3599,3655, %U A008917 3745,3926,4105,4112,4131,4168,4229,4320,4376,4402,4437,4447 %N A008917 Numbers that are the sum of 3 positive cubes in more than one way. %C A008917 Of course reordering the terms does not count. %C A008917 A025456(a(n)) > 1. [_Reinhard Zumkeller_, Apr 23 2009] %H A008917 T. D. Noe and Christian N. K. Anderson, <a href="/A008917/b008917.txt">Table of n, a(n) for n = 1..10000</a> (first 1000 terms are from T. D. Noe) %H A008917 Christian N. K. Anderson, <a href="/A008917/a008917.txt">Decomposition</a> of first 10000 terms into multiple cube triples. %e A008917 a(2) = 1009 = 1^3+2^3+10^3 = 4^3+6^3+9^3. %t A008917 Select[Range[4450], 1 < Length @ Cases[PowersRepresentations[#, 3, 3], {_?Positive, _?Positive, _?Positive}] &] (* _Jean-François Alcover_, Apr 04 2011 *) %o A008917 (PARI) is(n)=k=ceil((n-2)^(1/3)); d=0; for(a=1, k, for(b=a, k, for(c=b, k, if(a^3+b^3+c^3==n, d++)))); d %o A008917 n=3; while(n<5000, if(is(n)>1, print1(n, ", ")); n++) \\ _Derek Orr_, Aug 27 2015 %Y A008917 Cf. A001235, A003072, A024796, A025396, A025398, A025406, A309762. %K A008917 nonn,easy,nice %O A008917 1,1 %A A008917 _N. J. A. Sloane_ and _J. H. Conway_