|
| |
|
|
A128210
|
|
Number triangle T(n,k)=(-1)^(n-k)*[k<=n]*Product{i=1..n,Sum{j=0..i-1,A078008(j-1)}/Product{i=1..k,Sum{j=0..i-1,A078008(j-1)}}.
|
|
1
|
|
|
|
1, -1, 1, 1, -1, 1, -3, 3, -3, 1, 15, -15, 15, -5, 1, -165, 165, -165, 55, -11, 1, 3465, -3465, 3465, -1155, 231, -21, 1, -148995, 148995, -148995, 49665, -9933, 903, -43, 1, 12664575, -12664575, 12664575
(list;
table;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
|
OFFSET
|
0,7
|
|
|
COMMENTS
|
Inverse is A128208. Sub-diagonals include -A001045(n+1) and A084175(n+1).
|
|
|
LINKS
|
Table of n, a(n) for n=0..38.
|
|
|
EXAMPLE
|
Triangle begins
1,
-1, 1,
1, -1, 1,
-3, 3, -3, 1,
15, -15, 15, -5, 1,
-165, 165, -165, 55, -11, 1,
3465, -3465, 3465, -1155, 231, -21, 1,
-148995, 148995, -148995, 49665, -9933, 903, -43, 1
|
|
|
CROSSREFS
|
Sequence in context: A155969 A076237 A201432 * A215409 A239232 A153012
Adjacent sequences: A128207 A128208 A128209 * A128211 A128212 A128213
|
|
|
KEYWORD
|
easy,sign,tabl
|
|
|
AUTHOR
|
Paul Barry, Feb 19 2007
|
|
|
STATUS
|
approved
|
| |
|
|
