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 A186672 #17 Feb 16 2025 08:33:14 %S A186672 0,6,60,640,6239,60228,600196,6000213,60000231,600000239,6000000240 %N A186672 Total number of n-digit numbers requiring 13 positive biquadrates in their representation as sum of biquadrates. %C A186672 A102831(n) + A186650(n) + A186652(n) + A186654(n) + A186656(n) + A186658(n) + A186660(n) + A186662(n) + A186664(n) + A186666(n) + A186668(n) + A186670(n) + a(n) + A186674(n) + A186676(n) + A186678(n) + A186681(n) + A186683(n) + A186685(n) = A052268(n), for n>1. %H A186672 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/WaringsProblem.html">Waring's Problem.</a> %F A186672 a(n) = A186671(n) - A186671(n-1). %Y A186672 Cf. A046044, A186671. %K A186672 nonn,base,more %O A186672 1,2 %A A186672 _Martin Renner_, Feb 25 2011 %E A186672 a(5)-a(11) from _Giovanni Resta_, Apr 29 2016