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 A363040 #12 Feb 16 2025 08:34:05 %S A363040 1,17,37,53,86,119,177,215,275,331,424,516,632,764,928,1057,1247,1427, %T A363040 1635,1879,2119,2409,2715,3008,3395,3760,4189,4667,5171,5617,6178, %U A363040 6786,7438,8071,8836,9572,10456,11333,12396,13266,14214,15379,16518,17703,19018,20275 %N A363040 a(n) is the smallest number which can be represented as the sum of n distinct perfect powers (A001597) in exactly n ways, or -1 if no such number exists. %H A363040 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/PerfectPower.html">Perfect Power</a> %e A363040 For n = 2: 17 = 1 + 16 = 8 + 9. %Y A363040 Cf. A001597, A362424, A362425, A362428. %K A363040 nonn %O A363040 1,2 %A A363040 _Ilya Gutkovskiy_, May 14 2023 %E A363040 a(13) and beyond from _Michael S. Branicky_, May 24 2023