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 A281973 #5 Feb 03 2017 20:52:02
%S A281973 1,3,9,33,93,242,568,1237,2532,4905,9071,16113,27654,45997,74388,
%T A281973 117408,181271,274163,407066,594568,855087,1211979,1695785,2344564,
%U A281973 3204123,4332497,5802690,7699864,10126446,13212343,17109772,21991217,28071644,35611707,44895662
%N A281973 Number of sets of exactly n positive integers <= n+10 having a square element sum.
%H A281973 Alois P. Heinz, <a href="/A281973/b281973.txt">Table of n, a(n) for n = 0..1000</a>
%F A281973 a(n) = A281871(n+10,n).
%e A281973 a(0) = 1: {}.
%e A281973 a(1) = 3: {1}, {4}, {9}.
%e A281973 a(2) = 9: {1,3}, {1,8}, {2,7}, {3,6}, {4,5}, {4,12}, {5,11}, {6,10}, {7,9}.
%Y A281973 A diagonal of A281871.
%K A281973 nonn
%O A281973 0,2
%A A281973 _Alois P. Heinz_, Feb 03 2017