|
|
|
|
1, 1, 1, 1, 1, 2, 1, 1, 2, 5, 1, 1, 1, 11, 14, 1, 1, 1, 9, 71, 42, 1, 1, 1, 5, 161, 425, 132, 1, 1, 1, 2, 251, 1979, 2383, 429, 1, 1, 1, 1, 303, 6277, 19509, 12805, 1430, 1, 1, 1, 1, 299, 15675, 106493, 168609, 66947, 4862
(list;
table;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
0,6
|
|
COMMENTS
|
Row sums = A005095: (1, 2, 4, 9, 28, 125, 726, ...).
Main diagonal = A000108, the Catalan numbers: (1, 1, 2, 5, 14, 42, 132, ...).
|
|
LINKS
|
|
|
FORMULA
|
A122890 + A000012 - Identity matrix; as infinite lower triangular matrices.
|
|
EXAMPLE
|
First few rows of the triangle:
1;
1, 1;
1, 1, 2;
1, 1, 2, 5;
1, 1, 1, 11, 14;
1, 1, 1, 9, 71, 42;
1, 1, 1, 5, 161, 425, 132;
1, 1, 1, 2, 251, 1979, 2383, 429;
...
|
|
CROSSREFS
|
|
|
KEYWORD
|
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|