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 A374422 #9 Jul 30 2025 00:57:18 %S A374422 9,101,5104,811538 %N A374422 a(n) is the smallest number which can be represented as the sum of 3 distinct positive n-th powers in exactly 3 ways, or -1 if no such number exists. %e A374422 a(3) = 5104 = 1^3 + 12^3 + 15^3 = 2^3 + 10^3 + 16^3 = 9^3 + 10^3 + 15^3. %e A374422 a(4) = 811538 = 4^4 + 23^4 + 27^4 = 7^4 + 21^4 + 28^4 = 12^4 + 17^4 + 29^4. %Y A374422 Cf. A046881, A342893, A374418, A374421, A374423, A374424, A374425. %K A374422 nonn,hard,more %O A374422 1,1 %A A374422 _Ilya Gutkovskiy_, Jul 08 2024