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 A211806 #4 May 07 2012 16:15:13
%S A211806 1,5,16,36,69,119,190,282,399,547,726,940,1195,1493,1834,2224,2669,
%T A211806 3165,3720,4338,5021,5771,6596,7494,8467,9521,10662,11890,13207,14621,
%U A211806 16134,17742,19457,21283,23214,25258,27421,29703,32108,34638
%N A211806 Number of ordered triples (w,x,y) with all terms in {1,...,n} and 2w^2<=x^2+y^2.
%C A211806 Row 2 of A211808; see A211790 for a discussion and guide to related sequences.
%t A211806 (See the program at A211808.)
%Y A211806 Cf. A211790, A211808.
%K A211806 nonn
%O A211806 1,2
%A A211806 _Clark Kimberling_, Apr 22 2012