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 A047698 #19 May 16 2021 01:48:53 %S A047698 2056364173794800,12191487610289536,263214614245734400, %T A047698 696885239160606459,1560510414117060608,4497268448089227600, %U A047698 18896044524917750533,25704745581139341318,26662783403703215232,33691470623454003200,44053472466326057527,100502405478837434259 %N A047698 Numbers that are the sum of four positive seventh powers in two or more ways. %H A047698 D. J. Bernstein, <a href="http://pobox.com/~djb/papers/sortedsums.dvi">Enumerating solutions to p(a) + q(b) = r(c) + s(d)</a> %H A047698 R. L. Ekl, <a href="http://dx.doi.org/10.1090/S0025-5718-98-00979-X">New Results in Equal Sums of Like Powers</a>, Math. Comput. 67, 1309-1315, 1998. %e A047698 4497268448089227600 = 30^7 + 42^7 + 369^7 + 447^7 = 45^7 + 270^7 + 387^7 + 438^7. - _Sean A. Irvine_, May 15 2021 %Y A047698 Cf. A025367, A025406, A309763. %K A047698 nonn,hard %O A047698 1,1 %A A047698 _N. J. A. Sloane_ %E A047698 Corrected by D. J. Bernstein (djb(AT)cr.yp.to) %E A047698 a(6)-a(12) from _Sean A. Irvine_, May 14 2021