

A182112


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


2



1, 4, 7, 10, 13, 16, 20, 24, 28, 32, 36, 40, 45, 50, 55, 60, 65, 70, 75, 80, 86, 92, 98, 104, 110, 116, 122, 128, 134, 140, 147, 154, 161, 168, 175, 182, 189, 196, 203, 210, 217, 224, 232, 240, 248, 256, 264, 272, 280, 288, 296, 304, 312, 320, 328, 336
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OFFSET

0,2


COMMENTS

For a guide to related sequences, see A211422.


LINKS

Table of n, a(n) for n=0..55.


MATHEMATICA

t[n_] := t[n] = Flatten[Table[(n + w)^2  x  y  w, {w, n, n}, {x, n, n}, {y, n, n}]]
c[n_] := Count[t[n], 0]
t = Table[c[n], {n, 0, 70}] (* A182112 *)


CROSSREFS

Cf. A211422.
Sequence in context: A143456 A310682 A090852 * A090955 A310683 A134027
Adjacent sequences: A182109 A182110 A182111 * A182113 A182114 A182115


KEYWORD

nonn


AUTHOR

Clark Kimberling, Apr 12 2012


STATUS

approved



