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 A374423 #5 Jul 19 2024 19:14:25 %S A374423 10,161,13896,5978882 %N A374423 a(n) is the smallest number which can be represented as the sum of 3 distinct positive n-th powers in exactly 4 ways, or -1 if no such number exists. %e A374423 a(3) = 13896 = 1^3 + 12^3 + 23^3 = 2^3 + 4^3 + 24^3 = 4^3 + 18^3 + 20^3 = 9^3 + 10^3 + 23^3. %e A374423 a(4) = 5978882 = 3^4 + 40^4 + 43^4 = 8^4 + 37^4 + 45^4 = 15^4 + 32^4 + 47^4 = 23^4 + 25^4 + 48^4. %Y A374423 Cf. A046881, A374418, A374421, A374422, A374424, A374425. %K A374423 nonn,hard,more %O A374423 1,1 %A A374423 _Ilya Gutkovskiy_, Jul 08 2024