A155091 - OEIS

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

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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,

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