|
Search: id:A119305
|
|
|
| A119305 |
|
Riordan array (1-4x,x(1-x)^3). |
|
+0
3
|
|
| 1, -4, 1, 0, -7, 1, 0, 15, -10, 1, 0, -13, 39, -13, 1, 0, 4, -80, 72, -16, 1, 0, 0, 95, -228, 114, -19, 1, 0, 0, -66, 462, -484, 165, -22, 1, 0, 0, 25, -630, 1375, -875, 225, -25, 1, 0, 0, -4, 588, -2772, 3185, -1428, 294, -28, 1, 0, 0, 0, -372, 4092, -8463, 6324, -2170, 372
(list; table; graph; listen)
|
|
|
OFFSET
|
0,2
|
|
|
COMMENT
|
Inverse of number triangle binomial(4n-k,n-k), A119304. Row sums are A119306.
|
|
FORMULA
|
Number triangle T(n,k)=(C(3k,n-k)+4*C(3k,n-k-1))(-1)^(n-k)
|
|
EXAMPLE
|
Triangle begins
1,
-4, 1,
0, -7, 1,
0, 15, -10, 1,
0, -13, 39, -13, 1,
0, 4, -80, 72, -16, 1,
0, 0, 95, -228, 114, -19, 1
|
|
CROSSREFS
|
Sequence in context: A046784 A011349 A060196 this_sequence A062175 A085659 A152420
Adjacent sequences: A119302 A119303 A119304 this_sequence A119306 A119307 A119308
|
|
KEYWORD
|
easy,sign,tabl
|
|
AUTHOR
|
Paul Barry (pbarry(AT)wit.ie), May 13 2006
|
|
|
Search completed in 0.002 seconds
|
