|
Search: id:A080246
|
|
| |
|
| 1, -2, 1, 2, -4, 1, -2, 8, -6, 1, 2, -12, 18, -8, 1, -2, 16, -38, 32, -10, 1, 2, -20, 66, -88, 50, -12, 1, -2, 24, -102, 192, -170, 72, -14, 1, 2, -28, 146, -360, 450, -292, 98, -16, 1, -2, 32, -198, 608, -1002, 912, -462, 128, -18, 1, 2, -36, 258, -952, 1970, -2364
(list; table; graph; listen)
|
|
|
OFFSET
|
0,2
|
|
|
COMMENT
|
Written as lower triangular matrix this has inverse A080247. Row sums are (1,-1,-1,1,1,-1,-1,1,1,...) Diagonal sums are signed tribonacci numbers A078042
|
|
FORMULA
|
Columns are generated by (1-x)^k/(1+x)^k
|
|
EXAMPLE
|
Rows are {1}, {-2,1}, {2,-4,1}, {-2,8,-6,1}, ...
|
|
CROSSREFS
|
Cf. A035607, A080247.
Sequence in context: A035015 A114791 A129994 this_sequence A113413 A125694 A136678
Adjacent sequences: A080243 A080244 A080245 this_sequence A080247 A080248 A080249
|
|
KEYWORD
|
easy,sign,tabl
|
|
AUTHOR
|
Paul Barry (pbarry(AT)wit.ie), Feb 15 2003
|
|
|
Search completed in 0.002 seconds
|
