|
Search: id:A110857
|
|
|
| A110857 |
|
Table T(n,k), n>=0, k>=0, product M*M^(T) where M is the lower triangular matrix in A106566 and M^(T) denotes the transpose matrix of M, read by antidiagonals. |
|
+0
1
|
|
| 1, 0, 0, 0, 1, 0, 0, 1, 1, 0, 0, 2, 2, 2, 0, 0, 5, 4, 4, 5, 0, 0, 14, 10, 9, 10, 14, 0, 0, 42, 28, 23, 23, 28, 42, 0, 0, 132, 84, 65, 60, 65, 84, 132, 0, 0, 429, 264, 196, 171, 171, 196, 264, 429, 0, 0, 1430, 858, 618, 518, 490, 518, 618, 858, 1430, 0
(list; table; graph; listen)
|
|
|
OFFSET
|
0,12
|
|
|
EXAMPLE
|
Matrix M:
1, 0, 0, 0, 0, 0, 0, 0, ...
0, 1, 0, 0, 0, 0, 0, 0, ...
0, 1, 1, 0, 0, 0, 0, 0, ...
0, 2, 2, 1, 0, 0, 0, 0, ...
0, 5, 5, 3, 1, 0, 0, 0, ...
...
Matrix M^(T):
1, 0, 0, 0, 0, 0, ...
0, 1, 1, 2, 5, 14, ...
0, 0, 1, 2, 5, 14, ...
0, 0, 0, 1, 3, 9, ...
0, 0, 0, 0, 1, 4, ...
0, 0, 0, 0, 0, 1, ...
...
Table begins:
1, 0, 0, 0, 0, 0, 0, ...
0, 1, 1, 2, 5, 14, ...
0, 1, 2, 4, 10, 28, ...
0, 2, 4, 9, 23, 65, ...
0, 5, 10, 23, 60, ...
0, 14, 28, 65, 171, ...
0, 42, 84, 196, ...
|
|
CROSSREFS
|
Diagonal sums : 1, 0, 1, 2, 6, 18, 57, 186, 622, 2120, ... see A000957.
Sequence in context: A037864 A034852 A112790 this_sequence A108867 A095767 A071446
Adjacent sequences: A110854 A110855 A110856 this_sequence A110858 A110859 A110860
|
|
KEYWORD
|
sign,tabl
|
|
AUTHOR
|
Philippe DELEHAM (kolotoko(AT)wanadoo.fr), Sep 17 2005
|
|
|
Search completed in 0.002 seconds
|
