A155091 Triangle read by rows. Signed version of A145362. Main diagonal positive, rest of the nonzero terms negative.

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

Offset

1,1

Comments

Matrix inverse of this triangle is A155092.

Links

Table of n, a(n) for n=1..86.

Example

Table begins:
1,
-1,1,
0,-1,1,
0,-1,-1,1,
0,0,-1,-1,1,
0,0,-1,-1,-1,1,
0,0,0,-1,-1,-1,1,
0,0,0,-1,-1,-1,-1,1,
0,0,0,0,-1,-1,-1,-1,1,
0,0,0,0,-1,-1,-1,-1,-1,1,

Crossrefs

Cf. A145362.

Sequence in context: A163804 A181653 A343159 * A145362 A261092 A285960

Adjacent sequences: A155088 A155089 A155090 * A155092 A155093 A155094

Keyword

sign,tabl

Author

Mats Granvik, Jan 20 2009

Status

approved