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 A046050 #23 Feb 16 2025 08:32:38
%S A046050 79,159,239,319,399,479,559
%N A046050 Sum of 19 but no fewer nonzero fourth powers.
%C A046050 Dickson noted that this sequence is complete to 4100. Deshouillers, Hennecart and Landreau showed that this sequence is complete up to 10^245, and Kawada, Wooley and Deshouillers showed that it is complete beyond 10^220.
%D A046050 J.-M. Deshouillers, K. Kawada and T. D. Wooley, On sums of sixteen biquadrates, Mem. Soc. Math. Fr. 100 (2005), pp. 120.
%H A046050 J.-M. Deshouillers, F. Hennecart and B. Landreau, <a href="http://archive.numdam.org/article/JTNB_2000__12_2_411_0.pdf">Waring's Problem for sixteen biquadrates - numerical results</a>, Journal de Théorie des Nombres de Bordeaux 12:2 (2000), pp. 411-422.
%H A046050 L. E. Dickson, <a href="http://www.ams.org/journals/bull/1933-39-10/S0002-9904-1933-05719-1/S0002-9904-1933-05719-1.pdf">Recent progress on Waring's theorem and its generalizations</a>, Bull. Amer. Math. Soc. 39:10 (1933), pp. 701-727.
%H A046050 Tanya Khovanova, <a href="http://www.tanyakhovanova.com/RecursiveSequences/NonRecursions.html">Non Recursions</a>
%H A046050 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/BiquadraticNumber.html">Biquadratic Number</a>
%t A046050 Select[Range[1000], (pr = PowersRepresentations[#, 19, 4]; test = pr != {} && FreeQ[pr, r_List /; (Times @@ r) == 0]; If[test, Print[#]]; test) &] (* _Jean-François Alcover_, Oct 30 2012 *)
%o A046050 (PARI) is(n)=n%80==79 && n<600 && n>0 \\ _Charles R Greathouse IV_, Jan 23 2014
%Y A046050 Cf. A000583, A002377, A046049.
%K A046050 nonn,fini,full
%O A046050 1,1
%A A046050 _Eric W. Weisstein_
%E A046050 More terms from Arlin Anderson (starship1(AT)gmail.com). _Jud McCranie_ remarks that probably all terms are shown.