|
|
A305633
|
|
Expansion of Sum_{r not a perfect power} x^r/(1 + x^r).
|
|
2
|
|
|
0, 0, 1, 1, -1, 1, 1, 1, -1, 1, 1, 1, -2, 1, 1, 3, -1, 1, 2, 1, -2, 3, 1, 1, -3, 1, 1, 1, -2, 1, 1, 1, -1, 3, 1, 3, -3, 1, 1, 3, -3, 1, 1, 1, -2, 4, 1, 1, -4, 1, 2, 3, -2, 1, 3, 3, -3, 3, 1, 1, -4, 1, 1, 4, -1, 3, 1, 1, -2, 3, 1, 1, -3, 1, 1, 4, -2, 3, 1, 1, -4
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
0,13
|
|
LINKS
|
|
|
MATHEMATICA
|
nn=100;
wadQ[n_]:=n>1&&GCD@@FactorInteger[n][[All, 2]]==1;
ser=Sum[x^p/(1+x^p), {p, Select[Range[nn], wadQ]}];
Table[SeriesCoefficient[ser, {x, 0, n}], {n, nn}]
|
|
CROSSREFS
|
Cf. A000607, A001597, A007916, A048165, A081362, A091050, A303707, A304779, A304817, A305614, A305630-A305635.
|
|
KEYWORD
|
sign
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|