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 A211649 Number of ordered triples (w,x,y) with all terms in {1,...,n} and w^2+x^2+y^2=2n. 3
 0, 0, 0, 3, 0, 0, 1, 6, 0, 3, 0, 3, 3, 6, 0, 6, 0, 3, 3, 9, 0, 6, 3, 6, 1, 6, 0, 12, 6, 0, 0, 12, 0, 12, 3, 6, 3, 12, 3, 6, 0, 3, 6, 15, 3, 12, 0, 12, 3, 12, 0, 6, 6, 6, 4, 18, 0, 12, 6, 9, 6, 12, 0, 18, 0, 0, 6, 21, 3, 12, 6, 6, 3, 21, 0, 15, 9, 12, 0, 12, 0, 12, 9, 15, 6, 12, 3, 18 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,4 COMMENTS For a guide to related sequences, see A211422. LINKS MATHEMATICA t = Compile[{{n, _Integer}}, Module[{s = 0},     (Do[If[w^2 + x^2 + y^2 == 2 n, s = s + 1],         {w, 1, #}, {x, 1, #}, {y, 1, #}] &[n]; s)]]; Map[t[#] &, Range[0, 400]]    (* A211649 *) -1 + Flatten[Position[%, 0]]  (* A182195 *) (* Peter J. C. Moses, Apr 13 2012 *) CROSSREFS Cf. A211422. Sequence in context: A235794 A090030 A293616 * A202023 A080159 A144299 Adjacent sequences:  A211646 A211647 A211648 * A211650 A211651 A211652 KEYWORD nonn AUTHOR Clark Kimberling, Apr 18 2012 STATUS approved

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Last modified December 2 10:34 EST 2021. Contains 349437 sequences. (Running on oeis4.)