

A211437


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


2



1, 4, 12, 12, 24, 12, 36, 12, 40, 24, 36, 12, 72, 12, 36, 36, 60, 12, 72, 12, 72, 36, 36, 12, 120, 24, 36, 40, 72, 12, 108, 12, 84, 36, 36, 36, 144, 12, 36, 36, 120, 12, 108, 12, 72, 72, 36, 12, 180, 24, 72, 36, 72, 12, 120, 36, 120, 36, 36, 12, 216, 12, 36, 72
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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..63.


MATHEMATICA

t[n_] := t[n] = Flatten[Table[w*x*y  n, {w, n, n}, {x, n, n}, {y, n, n}]]
c[n_] := Count[t[n], 0]
t = Table[c[n], {n, 0, 80}] (* A211437 *)
t/4 (* A007425 for n>0 *)


CROSSREFS

Cf. A211422, A007425.
Sequence in context: A120213 A005886 A096442 * A195199 A294628 A323188
Adjacent sequences: A211434 A211435 A211436 * A211438 A211439 A211440


KEYWORD

nonn


AUTHOR

Clark Kimberling, Apr 12 2012


STATUS

approved



