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A131257
Triangle read by rows: A052509 * A097807 as infinite lower triangular matrices.
1
1, 0, 1, 0, 1, 1, -1, 2, 1, 1, 0, 1, 3, 1, 1, 0, 1, 4, 3, 1, 1, 1, 0, 6, 5, 3, 1, 1, 0, 1, 6, 10, 5, 3, 1, 1, 0, 1, 7, 15, 11, 5, 3, 1, 1, -1, 2, 7, 22, 20, 11, 5, 3, 1, 1, 0, 1, 9, 28, 36, 21, 11, 5, 3, 1, 1, 0, 1, 10, 36, 57, 42, 21, 11, 5, 3, 1, 1, 1, 0, 12, 44, 86, 77, 43, 21, 11, 5, 3, 1, 1
OFFSET
0,8
COMMENTS
Row sums give A099517.
FORMULA
A052509 * A000012 (signed, + - + - by columns).
EXAMPLE
First few rows of the triangle:
1;
0, 1;
0, 1, 1;
-1, 2, 1, 1;
0, 1, 3, 1, 1;
0, 1, 4, 3, 1, 1;
1, 0, 6, 5, 3, 1, 1;
...
CROSSREFS
KEYWORD
tabl,sign
AUTHOR
Gary W. Adamson, Jun 23 2007
EXTENSIONS
a(48) = 22 corrected and more terms from Georg Fischer, Jun 05 2023
STATUS
approved