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 A281972 #6 Feb 03 2017 20:31:43
%S A281972 1,3,8,26,69,166,365,750,1446,2646,4645,7856,12852,20411,31626,47910,
%T A281972 71022,103342,147982,208554,289572,397140,538319,720965,955716,
%U A281972 1255661,1634233,2108003,2699453,3431884,4329465,5426928,6764353,8377805,10314695,12640228
%N A281972 Number of sets of exactly n positive integers <= n+9 having a square element sum.
%H A281972 Alois P. Heinz, <a href="/A281972/b281972.txt">Table of n, a(n) for n = 0..1000</a>
%F A281972 a(n) = A281871(n+9,n).
%e A281972 a(1) = 3: {1}, {4}, {9}.
%e A281972 a(2) = 8: {1,3}, {1,8}, {2,7}, {3,6}, {4,5}, {5,11}, {6,10}, {7,9}.
%Y A281972 A diagonal of A281871.
%K A281972 nonn
%O A281972 0,2
%A A281972 _Alois P. Heinz_, Feb 03 2017