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A182112 Number of ordered triples (w,x,y) with all terms in {-n,...,0,...,n} and (w+n)^2=x+y+w. 2

%I

%S 1,4,7,10,13,16,20,24,28,32,36,40,45,50,55,60,65,70,75,80,86,92,98,

%T 104,110,116,122,128,134,140,147,154,161,168,175,182,189,196,203,210,

%U 217,224,232,240,248,256,264,272,280,288,296,304,312,320,328,336

%N Number of ordered triples (w,x,y) with all terms in {-n,...,0,...,n} and (w+n)^2=x+y+w.

%C For a guide to related sequences, see A211422.

%t t[n_] := t[n] = Flatten[Table[(n + w)^2 - x - y - w, {w, -n, n}, {x, -n, n}, {y, -n, n}]]

%t c[n_] := Count[t[n], 0]

%t t = Table[c[n], {n, 0, 70}] (* A182112 *)

%Y Cf. A211422.

%K nonn

%O 0,2

%A _Clark Kimberling_, Apr 12 2012

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Last modified March 6 04:42 EST 2021. Contains 341842 sequences. (Running on oeis4.)