|
|
A058372
|
|
a(n) = -(n + 1)*(2*n^2 + n - 12)/6.
|
|
1
|
|
|
2, 3, 1, -6, -20, -43, -77, -124, -186, -265, -363, -482, -624, -791, -985, -1208, -1462, -1749, -2071, -2430, -2828, -3267, -3749, -4276, -4850, -5473, -6147, -6874, -7656, -8495, -9393, -10352, -11374, -12461, -13615, -14838, -16132, -17499, -18941, -20460, -22058, -23737
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
0,1
|
|
LINKS
|
Table of n, a(n) for n=0..41.
|
|
FORMULA
|
G.f.: (2 - 5*x + x^2)/(1-x)^4.
|
|
MAPLE
|
seq(-sum(k^2-2, k=0..n), n=0..41); # Zerinvary Lajos, Jan 28 2008
|
|
MATHEMATICA
|
s=0; lst={}; Do[s+=n^2-2; AppendTo[lst, s*-1], {n, 0, 6!, 1}]; lst (* Vladimir Joseph Stephan Orlovsky, Nov 07 2008 *)
|
|
CROSSREFS
|
Sequence in context: A075263 A130850 A130405 * A128264 A232435 A114858
Adjacent sequences: A058369 A058370 A058371 * A058373 A058374 A058375
|
|
KEYWORD
|
sign,easy
|
|
AUTHOR
|
N. J. A. Sloane, Dec 18 2000
|
|
STATUS
|
approved
|
|
|
|