|
Search: id:A147746
|
|
|
| A147746 |
|
Riordan array (1, x(1-2x)/(1-3x+x^2)). |
|
+0
3
|
|
| 1, 0, 1, 0, 1, 1, 0, 2, 2, 1, 0, 5, 5, 3, 1, 0, 13, 14, 9, 4, 1, 0, 34, 40, 28, 14, 5, 1, 0, 89, 114, 87, 48, 20, 6, 1, 0, 233, 323, 267, 161, 75, 27, 7, 1, 0, 610, 910, 809, 528, 270, 110, 35, 8, 1
(list; table; graph; listen)
|
|
|
OFFSET
|
0,8
|
|
|
COMMENT
|
Triangle [0,1,1,1,0,0,0,....] DELTA [1,0,0,0,...] with Deleham DELTA as in A084938.
Note that 1/(1-x/(1-x/(1-x)))=(1-2x)/(1-3x+x^2). Row sums are A124302.
A147746*A007318=A147747.
|
|
EXAMPLE
|
Triangle begins
1,
0, 1,
0, 1, 1,
0, 2, 2, 1,
0, 5, 5, 3, 1,
0, 13, 14, 9, 4, 1,
0, 34, 40, 28, 14, 5, 1,
0, 89, 114, 87, 48, 20, 6, 1
|
|
CROSSREFS
|
Sequence in context: A112161 A128497 A011434 this_sequence A059365 A099039 A106566
Adjacent sequences: A147743 A147744 A147745 this_sequence A147747 A147748 A147749
|
|
KEYWORD
|
easy,nonn,tabl
|
|
AUTHOR
|
Paul Barry (pbarry(AT)wit.ie), Nov 11 2008
|
|
|
Search completed in 0.002 seconds
|
