|
| |
|
|
A147747
|
|
Riordan array ((1-3x+x^2)/(1-4x+3x^2), x(1-2x)/(1-4x+3x^2)).
|
|
4
| |
|
|
1, 1, 1, 2, 3, 1, 5, 9, 5, 1, 14, 28, 20, 7, 1, 41, 89, 75, 35, 9, 1, 122, 285, 273, 154, 54, 11, 1, 365, 913, 974, 634, 273, 77, 13, 1, 1094, 2918, 3420, 2502, 1256, 440, 104, 15, 1, 3281, 9297, 11850, 9578, 5439
(list; table; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 0,4
|
|
|
COMMENTS
| Triangle [1,1,1,1,0,0,0,....] DELTA [1,0,0,0,....] with Deleham DELTA as in A084938.
Row sums are A147748. A147747=A147746*A007318.
|
|
|
FORMULA
| Triangle begins
1,
1, 1,
2, 3, 1,
5, 9, 5, 1,
14, 28, 20, 7, 1,
41, 89, 75, 35, 9, 1,
122, 285, 273, 154, 54, 11, 1
|
|
|
CROSSREFS
| Sequence in context: A197701 A055905 A147703 * A039599 A154380 A155083
Adjacent sequences: A147744 A147745 A147746 * A147748 A147749 A147750
|
|
|
KEYWORD
| easy,nonn,tabl
|
|
|
AUTHOR
| Paul Barry (pbarry(AT)wit.ie), Nov 11 2008
|
| |
|
|
