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 A212051 #5 Dec 04 2016 19:46:29
%S A212051 0,0,0,0,0,16,28,32,40,52,112,120,164,172,192,280,310,322,398,410,580,
%T A212051 644,680,696,816,1004,1048,1138,1218,1238,1592,1616,1702,1798,1854,
%U A212051 2138,2394,2422,2486,2598,3068,3100,3368,3400,3536,3976,4056
%N A212051 Number of (w,x,y,z) with all terms in {1,...,n} and 3w*x=5*y*z.
%C A212051 Each term is divisible by 2. See A211795 for a guide to related sequences.
%t A212051 t = Compile[{{n, _Integer}}, Module[{s = 0},
%t A212051 (Do[If[3 w*x == 5 y*z, s = s + 1],
%t A212051 {w, 1, #}, {x, 1, #}, {y, 1, #}, {z, 1, #}] &[n]; s)]];
%t A212051 Map[t[#] &, Range[0, 50]] (* A212051 *)
%t A212051 %/2 (* integers *)
%t A212051 (* _Peter J. C. Moses_, Apr 13 2012 *)
%Y A212051 Cf. A211795.
%K A212051 nonn
%O A212051 0,6
%A A212051 _Clark Kimberling_, Apr 29 2012