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 A003370 #18 Aug 04 2020 17:16:36 %S A003370 3,130,257,384,2189,2316,2443,4375,4502,6561,16386,16513,16640,18572, %T A003370 18699,20758,32769,32896,34955,49152,78127,78254,78381,80313,80440, %U A003370 82499,94510,94637,96696,110893,156251,156378,158437,172634,234375,279938,280065,280192,282124,282251 %N A003370 Numbers that are the sum of 3 positive 7th powers. %H A003370 Chai Wah Wu, <a href="/A003370/b003370.txt">Table of n, a(n) for n = 1..10000</a> %e A003370 From _David A. Corneth_, Aug 04 2020: (Start) %e A003370 1320614777 is in the sequence as 1320614777 = 9^7 + 12^7 + 20^7. %e A003370 5868568576 is in the sequence as 5868568576 = 8^7 + 20^7 + 24^7. %e A003370 17285710304 is in the sequence as 17285710304 = 3^7 + 12^7 + 29^7. (End) %o A003370 (PARI) list(lim)=my(v=List(),x7,t); lim\=1; for(x=1,sqrtnint(lim-2,7), x7=x^7; for(y=1,min(sqrtnint(lim-x7,7),x), t=x7+y^7; for(z=1,min(sqrtnint(lim-t,7),y), listput(v,t+z^7)))); Set(v) \\ _Charles R Greathouse IV_, Nov 05 2017 %Y A003370 Cf. A001015. %K A003370 nonn,easy %O A003370 1,1 %A A003370 _N. J. A. Sloane_