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 A332665 #11 Mar 20 2020 20:03:52
%S A332665 71,2543,146687,55871,63703,353087,606239,21073228,4606428,19212172,
%T A332665 16301375,88507864,228238087,126691212,121909855,366845415,448525727,
%U A332665 1818767247,1319413228,341968924,673747279,188739607,2366756975,1770393855,411629407,1240489516
%N A332665 a(n) = largest number k that is not the sum of {2 squares, a nonnegative 5th power, and a nonnegative n-th power}.
%C A332665 All terms are conjectural and have only been checked up to 4*10^9.
%H A332665 W. Jagy and I. Kaplansky, <a href="https://projecteuclid.org/euclid.em/1062621075">Sums of Squares, Cubes and Higher Powers</a>, Experimental Mathematics, vol. 4 (1995) pp. 169-173.
%e A332665 a(4) = 2543, since 2543 is the greatest number such that is not the sum of {2 squares, a nonnegative 5th power, and a 4th power} (at least up to 4*10^9).
%Y A332665 Cf. A022566, A111151, A299796.
%K A332665 nonn
%O A332665 3,1
%A A332665 _XU Pingya_, Feb 19 2020