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A143315
Triangle read by rows: T(n, k) = 2*A126988(n, k) - signum(A126988(n, k)).
4
1, 3, 1, 5, 0, 1, 7, 3, 0, 1, 9, 0, 0, 0, 1, 11, 5, 3, 0, 0, 1, 13, 0, 0, 0, 0, 0, 1, 15, 7, 0, 3, 0, 0, 0, 1, 17, 0, 5, 0, 0, 0, 0, 0, 1, 19, 9, 0, 0, 3, 0, 0, 0, 0, 1, 21, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 23, 11, 7, 5, 0, 3, 0, 0, 0, 0, 0, 1, 25, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1
OFFSET
1,2
COMMENTS
Row sums = A129235: (1, 4, 6, 11, 10, 20, 14,...).
FORMULA
By columns, replace the 1's in A051731 in succession with (1, 3, 5, 7,...).
EXAMPLE
First few rows of the triangle:
1;
3, 1;
5, 0, 1;
7, 3, 0, 1;
9, 0, 0, 0, 1;
11, 5, 3, 0, 0, 1;
13, 0, 0, 0, 0, 0, 1;
15, 7, 0, 3, 0, 0, 0, 1;
...
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
Gary W. Adamson, Aug 06 2008
EXTENSIONS
Definition corrected and a(50) split by Georg Fischer, Jun 08 2023
STATUS
approved