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 A343077 #15 May 29 2022 18:00:24 %S A343077 635318657,2673,259,260,261,262,263,264,265,266,267,268,269,270,256, %T A343077 257,258,259,260,261,262,263,264,265,266,267,268,269,270,271,272,273, %U A343077 274,275,276,277,278,279,280,281,282,283,284,285,286,287,288,289,290,291,292 %N A343077 a(n) is the smallest number that is the sum of n positive 4th powers in two ways. %C A343077 This is r(n,4,2) in Alter's notation. %H A343077 R. Alter, <a href="https://doi.org/10.1007/BFb0096461">Computations and generalizations on a remark of Ramanujan</a>, pp. 182-196 of "Analytic Number Theory (Philadelphia, 1980)", ed. M. I. Knopp, Lect. Notes Math., Vol. 899, 1981. See Table 3, page 190. %H A343077 <a href="/index/Rec#order_02">Index entries for linear recurrences with constant coefficients</a>, signature (2,-1). %F A343077 a(n) = n + 240 for n >= 16. %e A343077 a(2) = 635318657 = 59^4 + 158^4 = 133^4 + 134^4. %e A343077 a(3) = 2673 = 2^4 + 4^4 + 7^4 = 3^4 + 6^4 + 6^4. %Y A343077 Cf. A003824, A046881, A342902, A343078, A343079, A343082, A343086. %K A343077 nonn %O A343077 2,1 %A A343077 _Sean A. Irvine_, Apr 04 2021