|
Search: id:A164942
|
|
| |
|
| 1, 3, -1, 9, -6, 1, 27, -27, 9, -1, 81, -108, 54, -12, 1, 243, -405, 270, -90, 15, -1
(list; graph; listen)
|
|
|
OFFSET
|
1,2
|
|
|
COMMENT
|
Rows sum up to A000079, anti-diagonals sum up to A001906
Triangle, read by rows, given by [3,0,0,0,0,0,0,0,...] DELTA [ -1,0,0,0,0,0,0,0,...] where DELTA is the operator defined in A084938 . [From Philippe DELEHAM (kolotoko(AT)wanadoo.fr), Sep 02 2009]
|
|
EXAMPLE
|
Begins as triangle:
1
3,-1
9,-6,1
27,-27,9,-1
81,-108,54,-12,1
243,-405,270,-90,15,-1
|
|
CROSSREFS
|
A027465, A000079, A001906
Sequence in context: A105539 A132819 A105545 this_sequence A027465 A157393 A127552
Adjacent sequences: A164939 A164940 A164941 this_sequence A164943 A164944 A164945
|
|
KEYWORD
|
sign
|
|
AUTHOR
|
Mark Dols (markdols99(AT)yahoo.com), Sep 01 2009
|
|
|
Search completed in 0.002 seconds
|
