A176702 Triangle T(n,k) read by rows. A051731(n,k)-A051731(n,k+1).

1, 0, 1, 1, -1, 1, 0, 1, -1, 1, 1, 0, 0, -1, 1, 0, 0, 1, 0, -1, 1, 1, 0, 0, 0, 0, -1, 1, 0, 1, -1, 1, 0, 0, -1, 1, 1, -1, 1, 0, 0, 0, 0, -1, 1, 0, 1, 0, -1, 1, 0, 0, 0, -1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, -1, 1, 0, 0, 0, 1, -1, 1, 0, 0, 0, 0, -1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1, 1, 0, 1, 0, 0, 0, -1

Offset: 1

Author

Mats Granvik, Gary W. Adamson, Apr 24 2010

Keywords

• sign
• tabl

Comments

Matrix inverse of A134541.

The subsequence of A180430 beginning from the second column, divided by 2, equals this sequence. [From Mats Granvik, Sep 04 2010]

Examples

			Triangle begins:
1
0...1
1..-1...1
0...1..-1...1
1...0...0..-1...1
0...0...1...0..-1...1
1...0...0...0...0..-1...1
0...1..-1...1...0...0..-1...1
1..-1...1...0...0...0...0..-1...1
0...1...0..-1...1...0...0...0..-1...1
1...0...0...0...0...0...0...0...0..-1...1
0...0...0...1..-1...1...0...0...0...0..-1...1
		

Crossrefs

Cf. A176702*A000012=A051731. Row sums equals A000012.