|
|
|
|
1, 3, 1, 7, 5, 1, 13, 13, 7, 1, 21, 21, 21, 9, 1, 31, 31, 31, 31, 11, 1, 43, 43, 43, 43, 43, 13, 1, 57, 57, 57, 57, 57, 57, 15, 1, 73, 73, 73, 73, 73, 73, 73, 17, 1, 91, 91, 91, 91, 91, 91, 91, 91, 19, 1
(list;
table;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,2
|
|
COMMENTS
|
Row sums = A135859: (1, 4, 13, 34, 73, 136, ...).
|
|
LINKS
|
|
|
FORMULA
|
A128229^2 * A000012, where A128229 = a bidiagonal matrix with all 1's in the main diagonal and (1, 2, 3, ...) in the subdiagonal.
|
|
EXAMPLE
|
First few rows of the triangle:
1;
3, 1;
7, 5, 1;
13, 13, 7, 1;
21, 21, 21, 9, 1;
31, 31, 31, 31, 11, 1;
43, 43, 43, 43, 43, 13, 1;
...
|
|
CROSSREFS
|
|
|
KEYWORD
|
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|