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 A211800 #10 Sep 10 2022 07:34:19
%S A211800 0,3,13,32,64,113,181,272,388,535,713,926,1180,1475,1815,2204,2646,
%T A211800 3141,3695,4312,4992,5741,6563,7460,8432,9485,10625,11850,13166,14579,
%U A211800 16089,17696,19410,21233,23161,25204,27366,29647,32051,34580
%N A211800 Number of ordered triples (w,x,y) with all terms in {1,...,n} and 2*w^2 < x^2 + y^2.
%C A211800 Row 2 of A211802; see A211790 for a discussion and guide to related sequences.
%t A211800 (See the program at A211802.)
%Y A211800 Cf. A211790, A211801, A211802.
%K A211800 nonn
%O A211800 1,2
%A A211800 _Clark Kimberling_, Apr 22 2012
%E A211800 Definition corrected by _Georg Fischer_, Sep 10 2022