OFFSET
1,2
COMMENTS
First occurrence of n [0,500] is at a(k): 0,1,12,5,3,33,15,210,105, ..., . - Robert G. Wilson v, Nov 23 2005
EXAMPLE
For n=14 we have integer value for the form when k={13; 15; 18} and (14+k)/(14-k)^2 = {27, 29, 2}. Thus a(14) = 3
MATHEMATICA
f[n_] := Length[Select[(n + #)/(n - #)^2 & /@ Range[n^2 + 3], IntegerQ[ # ] &]]; Array[f, 105] (* Robert G. Wilson v *)
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Paolo P. Lava and Giorgio Balzarotti, Nov 22 2005
EXTENSIONS
Corrected and extended by Robert G. Wilson v, Nov 23 2005
STATUS
approved