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 A212048 #5 Dec 04 2016 19:46:29
%S A212048 0,0,0,2,14,18,30,34,74,104,128,136,216,228,260,318,438,454,554,570,
%T A212048 718,812,868,888,1128,1182,1250,1398,1614,1642,1864,1892,2204,2354,
%U A212048 2446,2570,2990,3026,3126,3304,3760,3800,4128,4168,4520,4906,5030
%N A212048 Number of (w,x,y,z) with all terms in {1,...,n} and 3w*x=4*y*z.
%C A212048 Each term is divisible by 2. See A211795 for a guide to related sequences.
%t A212048 t = Compile[{{n, _Integer}}, Module[{s = 0},
%t A212048 (Do[If[3 w*x == 4 y*z, s = s + 1],
%t A212048 {w, 1, #}, {x, 1, #}, {y, 1, #}, {z, 1, #}] &[n]; s)]];
%t A212048 Map[t[#] &, Range[0, 50]] (* A212048 *)
%t A212048 %/2 (* integers *)
%t A212048 (* _Peter J. C. Moses_, Apr 13 2012 *)
%Y A212048 Cf. A211795.
%K A212048 nonn
%O A212048 0,4
%A A212048 _Clark Kimberling_, Apr 29 2012