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A212066
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Number of (w,x,y,z) with all terms in {1,...,n} and w^2>x*y*z.
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3
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0, 0, 4, 24, 71, 166, 322, 571, 928, 1403, 2043, 2875, 3906, 5183, 6727, 8584, 10762, 13303, 16219, 19601, 23442, 27766, 32636, 38080, 44130, 50771, 58147, 66243, 75099, 84768, 95238, 106629, 118939, 132179, 146448, 161761, 178106
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OFFSET
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0,3
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COMMENTS
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LINKS
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MATHEMATICA
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t = Compile[{{n, _Integer}}, Module[{s = 0},
(Do[If[w^2 > x*y*z, s = s + 1],
{w, 1, #}, {x, 1, #}, {y, 1, #}, {z, 1, #}] &[n]; s)]];
Map[t[#] &, Range[0, 50]] (* A212066 *)
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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