OFFSET
0,6
COMMENTS
See A211795 for a guide to related sequences.
MATHEMATICA
t = Compile[{{n, _Integer}}, Module[{s = 0},
(Do[If[4 w*x == 5 y*z, s = s + 1],
{w, 1, #}, {x, 1, #}, {y, 1, #}, {z, 1, #}] &[n]; s)]];
Map[t[#] &, Range[0, 50]] (* A212052 *)
%/2 (* integers *)
(* Peter J. C. Moses, Apr 13 2012 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Clark Kimberling, Apr 29 2012
STATUS
approved