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A211651 Number of ordered triples (w,x,y) with all terms in {1,...,n} and w^3>=x^3+y^3. 5
0, 0, 1, 5, 14, 29, 53, 88, 134, 195, 270, 362, 473, 605, 762, 941, 1147, 1380, 1644, 1941, 2268, 2632, 3031, 3471, 3948, 4471, 5037, 5646, 6306, 7011, 7770, 8582, 9447, 10369, 11347, 12388, 13490, 14653, 15883, 17179, 18542, 19980, 21487 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

COMMENTS

For a guide to related sequences, see A211422.

LINKS

Table of n, a(n) for n=0..42.

MATHEMATICA

t = Compile[{{n, _Integer}}, Module[{s = 0},

    (Do[If[w^3 >= x^3 + y^3, s = s + 1],

        {w, 1, #}, {x, 1, #}, {y, 1, #}] &[n]; s)]];

Map[t[#] &, Range[0, 50]]  (* A211651  *)

(* Peter J. C. Moses, Apr 13 2012 *)

CROSSREFS

Cf. A211422.

Sequence in context: A321178 A256666 A319007 * A299291 A019262 A212919

Adjacent sequences:  A211648 A211649 A211650 * A211652 A211653 A211654

KEYWORD

nonn

AUTHOR

Clark Kimberling, Apr 19 2012

STATUS

approved

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Last modified November 16 12:40 EST 2018. Contains 317272 sequences. (Running on oeis4.)