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 A055420 #10 Aug 31 2025 09:17:00 %S A055420 1,6,26,99,357,1203,3819,11496,33044,91067,241283,616618,1525908, %T A055420 3670422,8609234,19739642,44323092,97594520,210952363,448015366, %U A055420 935625977,1922870258,3891946458,7763818914,15275110988,29660831057 %N A055420 Number of points in N^n of norm <= 5. %H A055420 Andrew Howroyd, <a href="/A055420/b055420.txt">Table of n, a(n) for n = 0..1000</a> %H A055420 <a href="/index/Rec#order_26">Index entries for linear recurrences with constant coefficients</a>, order 26. %Y A055420 Row n=5 of A302998. %K A055420 nonn,changed %O A055420 0,2 %A A055420 _David W. Wilson_