A144221 Triangle read by rows, A118433 * A007318^(-1) * A000012.

1, -1, -1, 1, 1, -1, -1, 5, -1, 1, 5, -11, 1, 1, 1, 9, -11, -11, 9, -1, -1, -9, -9, 51, -29, 1, 1, -1, -1, -57, 111, -29, -29, 13, -1, 1, -15, 113, -111, -111, 169, -55, 1, 1, 1, -31, 113, 113, -559, 449, -55, -55, 17, -1

Offset: 0

Author

Gary W. Adamson, Sep 14 2008

Keywords

• tabl
• sign

Comments

Row sums = (1, 0, 1, 2, -3, -4, 5, 6, -7, -8,...).

Examples

			First few rows of the triangle =
1;
1, -1;
-1, 1, 1;
-1, -1, 5, -1;
1, 5, -11, 1, 1;
1, 9, -11, -11, 9, -1;
-1, -9, -9, 51, -29, 1, 1
-1, -1, -57, 111, -29, -29, 13, -1;
1, -15, 113, -111, -111, 169, -55, 1, 1;
...
		

Crossrefs

A118433

Formula

Triangle read by rows, A118433 * A007318^(-1) * A000012.

A118433 = the self-inverse triangle. A007318^(-1) = the inverse of Pascal's triangle and A000012 = an infinite lower triangular matrix with all 1's.