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A110247
A Jacobi number triangle.
4
1, 0, 1, 0, 1, 1, 0, 1, -1, 1, 0, 1, -1, 0, 1, 0, 1, 1, -1, 1, 1, 0, 1, 1, -1, 1, -1, 1, 0, 1, -1, 0, 1, 0, 0, 1, 0, 1, -1, 1, 1, -1, 1, 1, 1, 0, 1, 1, 1, 1, 1, -1, -1, -1, 1, 0, 1, 1, 0, 1, 1, 0, 0, -1, 0, 1, 0, 1, -1, -1, 1, -1, -1, 1, 1, 1, 1, 1, 0, 1, -1, -1, 1, 0, -1, -1, 1, 1, 0, -1, 1
OFFSET
0,1
COMMENTS
Row sums are A110248. Diagonal sums are A110249. Inverse is A110250.
FORMULA
Number triangle T(n, k)=if(k<=n, Jacobi(k, 2n-2k+1), 0)
EXAMPLE
Rows begin
1;
0,1;
0,1,1;
0,1,-1,1;
0,1,-1,0,1;
0,1,1,-1,1,1;
0,1,1,-1,1,-1,1;
CROSSREFS
Cf. A110242.
Sequence in context: A111967 A177978 A213061 * A114607 A123110 A004593
KEYWORD
easy,sign,tabl
AUTHOR
Paul Barry, Jul 17 2005
STATUS
approved